123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698169917001701170217031704170517061707170817091710171117121713171417151716171717181719172017211722172317241725172617271728172917301731173217331734173517361737173817391740174117421743174417451746174717481749175017511752175317541755175617571758175917601761176217631764176517661767176817691770177117721773177417751776177717781779178017811782178317841785178617871788178917901791179217931794179517961797179817991800180118021803180418051806180718081809181018111812181318141815181618171818181918201821182218231824182518261827182818291830183118321833183418351836183718381839184018411842184318441845184618471848184918501851185218531854185518561857185818591860186118621863186418651866186718681869187018711872187318741875187618771878187918801881188218831884188518861887188818891890189118921893189418951896189718981899190019011902190319041905190619071908190919101911191219131914191519161917191819191920192119221923192419251926192719281929193019311932193319341935193619371938193919401941194219431944194519461947194819491950195119521953195419551956195719581959196019611962196319641965196619671968196919701971197219731974197519761977197819791980198119821983198419851986198719881989199019911992199319941995199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019202020212022202320242025202620272028202920302031203220332034203520362037203820392040204120422043204420452046204720482049205020512052205320542055205620572058205920602061206220632064206520662067206820692070207120722073207420752076207720782079208020812082208320842085208620872088208920902091209220932094209520962097209820992100210121022103210421052106210721082109211021112112211321142115211621172118211921202121212221232124212521262127212821292130213121322133213421352136213721382139214021412142214321442145214621472148214921502151215221532154215521562157215821592160216121622163216421652166216721682169217021712172217321742175217621772178217921802181218221832184218521862187218821892190219121922193219421952196219721982199220022012202220322042205220622072208220922102211221222132214221522162217221822192220222122222223222422252226222722282229223022312232223322342235223622372238223922402241224222432244224522462247224822492250225122522253225422552256225722582259226022612262226322642265226622672268226922702271227222732274227522762277227822792280228122822283228422852286228722882289229022912292229322942295229622972298229923002301230223032304230523062307230823092310231123122313231423152316231723182319232023212322232323242325232623272328232923302331233223332334233523362337233823392340234123422343234423452346234723482349235023512352235323542355235623572358235923602361236223632364236523662367236823692370237123722373237423752376237723782379238023812382238323842385238623872388238923902391239223932394239523962397239823992400240124022403240424052406240724082409241024112412241324142415241624172418241924202421242224232424242524262427242824292430243124322433243424352436243724382439244024412442244324442445244624472448244924502451245224532454245524562457245824592460246124622463246424652466246724682469247024712472247324742475247624772478247924802481248224832484248524862487248824892490249124922493249424952496249724982499250025012502250325042505250625072508250925102511251225132514251525162517251825192520252125222523252425252526252725282529253025312532253325342535253625372538253925402541254225432544254525462547254825492550255125522553255425552556255725582559256025612562256325642565256625672568256925702571257225732574257525762577257825792580258125822583258425852586258725882589259025912592259325942595259625972598259926002601260226032604260526062607260826092610261126122613261426152616261726182619262026212622262326242625262626272628262926302631263226332634263526362637263826392640264126422643264426452646264726482649265026512652265326542655265626572658265926602661266226632664266526662667266826692670267126722673267426752676267726782679268026812682268326842685268626872688268926902691269226932694269526962697269826992700270127022703270427052706270727082709271027112712271327142715271627172718271927202721272227232724272527262727272827292730273127322733273427352736273727382739274027412742274327442745274627472748274927502751275227532754275527562757275827592760276127622763276427652766276727682769277027712772277327742775277627772778277927802781278227832784278527862787278827892790279127922793279427952796279727982799280028012802280328042805280628072808280928102811281228132814281528162817281828192820282128222823282428252826282728282829283028312832283328342835283628372838283928402841284228432844284528462847284828492850285128522853285428552856285728582859286028612862286328642865286628672868286928702871287228732874287528762877287828792880288128822883288428852886288728882889289028912892289328942895289628972898289929002901290229032904290529062907290829092910291129122913291429152916291729182919292029212922292329242925292629272928292929302931293229332934293529362937293829392940294129422943294429452946294729482949295029512952295329542955295629572958295929602961296229632964296529662967296829692970297129722973297429752976297729782979298029812982298329842985298629872988298929902991299229932994299529962997299829993000300130023003300430053006300730083009301030113012301330143015301630173018301930203021302230233024302530263027302830293030303130323033303430353036303730383039304030413042304330443045304630473048304930503051305230533054305530563057305830593060306130623063306430653066306730683069307030713072307330743075307630773078307930803081308230833084308530863087308830893090309130923093309430953096309730983099310031013102310331043105310631073108310931103111311231133114311531163117311831193120312131223123312431253126312731283129313031313132313331343135313631373138313931403141314231433144314531463147314831493150315131523153315431553156315731583159316031613162316331643165316631673168316931703171317231733174317531763177317831793180318131823183318431853186318731883189319031913192319331943195319631973198319932003201320232033204320532063207320832093210321132123213321432153216321732183219322032213222322332243225322632273228322932303231323232333234323532363237323832393240324132423243324432453246324732483249325032513252325332543255325632573258325932603261326232633264326532663267326832693270327132723273327432753276327732783279328032813282328332843285328632873288328932903291329232933294329532963297329832993300330133023303330433053306330733083309331033113312331333143315331633173318331933203321332233233324332533263327332833293330333133323333333433353336333733383339334033413342334333443345334633473348334933503351335233533354335533563357335833593360336133623363336433653366336733683369337033713372337333743375337633773378337933803381338233833384338533863387338833893390339133923393339433953396339733983399340034013402340334043405340634073408340934103411341234133414341534163417341834193420342134223423342434253426342734283429343034313432343334343435343634373438343934403441344234433444344534463447344834493450345134523453345434553456345734583459346034613462346334643465346634673468346934703471347234733474347534763477347834793480348134823483348434853486348734883489349034913492349334943495349634973498349935003501350235033504350535063507350835093510351135123513351435153516351735183519352035213522352335243525352635273528352935303531353235333534353535363537353835393540354135423543354435453546354735483549355035513552355335543555355635573558355935603561356235633564356535663567356835693570357135723573357435753576357735783579358035813582358335843585358635873588358935903591359235933594359535963597359835993600360136023603360436053606360736083609361036113612361336143615361636173618361936203621362236233624362536263627362836293630363136323633363436353636363736383639364036413642364336443645364636473648364936503651365236533654365536563657365836593660366136623663366436653666366736683669367036713672367336743675367636773678367936803681368236833684368536863687368836893690369136923693369436953696369736983699370037013702370337043705370637073708370937103711371237133714371537163717371837193720372137223723372437253726372737283729373037313732373337343735373637373738373937403741374237433744374537463747374837493750375137523753375437553756375737583759376037613762376337643765376637673768376937703771377237733774377537763777377837793780378137823783378437853786378737883789379037913792379337943795379637973798379938003801380238033804380538063807380838093810381138123813381438153816381738183819382038213822382338243825382638273828382938303831383238333834383538363837383838393840384138423843384438453846384738483849385038513852385338543855385638573858385938603861386238633864386538663867386838693870387138723873387438753876387738783879388038813882388338843885388638873888388938903891389238933894389538963897389838993900390139023903390439053906390739083909391039113912391339143915391639173918391939203921392239233924392539263927392839293930393139323933393439353936393739383939394039413942394339443945394639473948394939503951395239533954395539563957395839593960396139623963396439653966396739683969397039713972397339743975397639773978397939803981398239833984398539863987398839893990399139923993399439953996399739983999400040014002400340044005400640074008400940104011401240134014401540164017401840194020402140224023402440254026402740284029403040314032403340344035403640374038403940404041404240434044404540464047404840494050405140524053405440554056405740584059406040614062406340644065406640674068406940704071407240734074407540764077407840794080408140824083408440854086408740884089409040914092409340944095409640974098409941004101410241034104410541064107410841094110411141124113411441154116411741184119412041214122412341244125412641274128412941304131413241334134413541364137413841394140414141424143414441454146414741484149415041514152415341544155415641574158415941604161416241634164416541664167416841694170417141724173417441754176417741784179418041814182418341844185418641874188418941904191419241934194419541964197419841994200420142024203420442054206420742084209421042114212421342144215421642174218421942204221422242234224422542264227422842294230423142324233423442354236423742384239424042414242424342444245424642474248424942504251425242534254425542564257425842594260426142624263426442654266426742684269427042714272427342744275427642774278427942804281428242834284428542864287428842894290429142924293429442954296429742984299430043014302430343044305430643074308430943104311431243134314431543164317431843194320432143224323432443254326432743284329433043314332433343344335433643374338433943404341434243434344434543464347434843494350435143524353435443554356435743584359436043614362436343644365436643674368436943704371437243734374437543764377437843794380438143824383438443854386438743884389439043914392439343944395439643974398439944004401440244034404440544064407440844094410 |
- /*
- * Copyright 2002-2005, Instant802 Networks, Inc.
- * Copyright 2005-2006, Devicescape Software, Inc.
- * Copyright 2007 Johannes Berg <[email protected]>
- * Copyright 2008-2011 Luis R. Rodriguez <[email protected]>
- * Copyright 2013-2014 Intel Mobile Communications GmbH
- * Copyright 2017 Intel Deutschland GmbH
- * Copyright (C) 2018 - 2022 Intel Corporation
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
- /**
- * DOC: Wireless regulatory infrastructure
- *
- * The usual implementation is for a driver to read a device EEPROM to
- * determine which regulatory domain it should be operating under, then
- * looking up the allowable channels in a driver-local table and finally
- * registering those channels in the wiphy structure.
- *
- * Another set of compliance enforcement is for drivers to use their
- * own compliance limits which can be stored on the EEPROM. The host
- * driver or firmware may ensure these are used.
- *
- * In addition to all this we provide an extra layer of regulatory
- * conformance. For drivers which do not have any regulatory
- * information CRDA provides the complete regulatory solution.
- * For others it provides a community effort on further restrictions
- * to enhance compliance.
- *
- * Note: When number of rules --> infinity we will not be able to
- * index on alpha2 any more, instead we'll probably have to
- * rely on some SHA1 checksum of the regdomain for example.
- *
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- #include <linux/kernel.h>
- #include <linux/export.h>
- #include <linux/slab.h>
- #include <linux/list.h>
- #include <linux/ctype.h>
- #include <linux/nl80211.h>
- #include <linux/platform_device.h>
- #include <linux/verification.h>
- #include <linux/moduleparam.h>
- #include <linux/firmware.h>
- #include <net/cfg80211.h>
- #include "core.h"
- #include "reg.h"
- #include "rdev-ops.h"
- #include "nl80211.h"
- /*
- * Grace period we give before making sure all current interfaces reside on
- * channels allowed by the current regulatory domain.
- */
- #define REG_ENFORCE_GRACE_MS 60000
- /**
- * enum reg_request_treatment - regulatory request treatment
- *
- * @REG_REQ_OK: continue processing the regulatory request
- * @REG_REQ_IGNORE: ignore the regulatory request
- * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
- * be intersected with the current one.
- * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
- * regulatory settings, and no further processing is required.
- */
- enum reg_request_treatment {
- REG_REQ_OK,
- REG_REQ_IGNORE,
- REG_REQ_INTERSECT,
- REG_REQ_ALREADY_SET,
- };
- static struct regulatory_request core_request_world = {
- .initiator = NL80211_REGDOM_SET_BY_CORE,
- .alpha2[0] = '0',
- .alpha2[1] = '0',
- .intersect = false,
- .processed = true,
- .country_ie_env = ENVIRON_ANY,
- };
- /*
- * Receipt of information from last regulatory request,
- * protected by RTNL (and can be accessed with RCU protection)
- */
- static struct regulatory_request __rcu *last_request =
- (void __force __rcu *)&core_request_world;
- /* To trigger userspace events and load firmware */
- static struct platform_device *reg_pdev;
- /*
- * Central wireless core regulatory domains, we only need two,
- * the current one and a world regulatory domain in case we have no
- * information to give us an alpha2.
- * (protected by RTNL, can be read under RCU)
- */
- const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
- /*
- * Number of devices that registered to the core
- * that support cellular base station regulatory hints
- * (protected by RTNL)
- */
- static int reg_num_devs_support_basehint;
- /*
- * State variable indicating if the platform on which the devices
- * are attached is operating in an indoor environment. The state variable
- * is relevant for all registered devices.
- */
- static bool reg_is_indoor;
- static DEFINE_SPINLOCK(reg_indoor_lock);
- /* Used to track the userspace process controlling the indoor setting */
- static u32 reg_is_indoor_portid;
- static void restore_regulatory_settings(bool reset_user, bool cached);
- static void print_regdomain(const struct ieee80211_regdomain *rd);
- static void reg_process_hint(struct regulatory_request *reg_request);
- static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
- {
- return rcu_dereference_rtnl(cfg80211_regdomain);
- }
- /*
- * Returns the regulatory domain associated with the wiphy.
- *
- * Requires any of RTNL, wiphy mutex or RCU protection.
- */
- const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
- {
- return rcu_dereference_check(wiphy->regd,
- lockdep_is_held(&wiphy->mtx) ||
- lockdep_rtnl_is_held());
- }
- EXPORT_SYMBOL(get_wiphy_regdom);
- static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
- {
- switch (dfs_region) {
- case NL80211_DFS_UNSET:
- return "unset";
- case NL80211_DFS_FCC:
- return "FCC";
- case NL80211_DFS_ETSI:
- return "ETSI";
- case NL80211_DFS_JP:
- return "JP";
- }
- return "Unknown";
- }
- enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
- {
- const struct ieee80211_regdomain *regd = NULL;
- const struct ieee80211_regdomain *wiphy_regd = NULL;
- enum nl80211_dfs_regions dfs_region;
- rcu_read_lock();
- regd = get_cfg80211_regdom();
- dfs_region = regd->dfs_region;
- if (!wiphy)
- goto out;
- wiphy_regd = get_wiphy_regdom(wiphy);
- if (!wiphy_regd)
- goto out;
- if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
- dfs_region = wiphy_regd->dfs_region;
- goto out;
- }
- if (wiphy_regd->dfs_region == regd->dfs_region)
- goto out;
- pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
- dev_name(&wiphy->dev),
- reg_dfs_region_str(wiphy_regd->dfs_region),
- reg_dfs_region_str(regd->dfs_region));
- out:
- rcu_read_unlock();
- return dfs_region;
- }
- static void rcu_free_regdom(const struct ieee80211_regdomain *r)
- {
- if (!r)
- return;
- kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
- }
- static struct regulatory_request *get_last_request(void)
- {
- return rcu_dereference_rtnl(last_request);
- }
- /* Used to queue up regulatory hints */
- static LIST_HEAD(reg_requests_list);
- static DEFINE_SPINLOCK(reg_requests_lock);
- /* Used to queue up beacon hints for review */
- static LIST_HEAD(reg_pending_beacons);
- static DEFINE_SPINLOCK(reg_pending_beacons_lock);
- /* Used to keep track of processed beacon hints */
- static LIST_HEAD(reg_beacon_list);
- struct reg_beacon {
- struct list_head list;
- struct ieee80211_channel chan;
- };
- static void reg_check_chans_work(struct work_struct *work);
- static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
- static void reg_todo(struct work_struct *work);
- static DECLARE_WORK(reg_work, reg_todo);
- /* We keep a static world regulatory domain in case of the absence of CRDA */
- static const struct ieee80211_regdomain world_regdom = {
- .n_reg_rules = 8,
- .alpha2 = "00",
- .reg_rules = {
- /* IEEE 802.11b/g, channels 1..11 */
- REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
- /* IEEE 802.11b/g, channels 12..13. */
- REG_RULE(2467-10, 2472+10, 20, 6, 20,
- NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
- /* IEEE 802.11 channel 14 - Only JP enables
- * this and for 802.11b only */
- REG_RULE(2484-10, 2484+10, 20, 6, 20,
- NL80211_RRF_NO_IR |
- NL80211_RRF_NO_OFDM),
- /* IEEE 802.11a, channel 36..48 */
- REG_RULE(5180-10, 5240+10, 80, 6, 20,
- NL80211_RRF_NO_IR |
- NL80211_RRF_AUTO_BW),
- /* IEEE 802.11a, channel 52..64 - DFS required */
- REG_RULE(5260-10, 5320+10, 80, 6, 20,
- NL80211_RRF_NO_IR |
- NL80211_RRF_AUTO_BW |
- NL80211_RRF_DFS),
- /* IEEE 802.11a, channel 100..144 - DFS required */
- REG_RULE(5500-10, 5720+10, 160, 6, 20,
- NL80211_RRF_NO_IR |
- NL80211_RRF_DFS),
- /* IEEE 802.11a, channel 149..165 */
- REG_RULE(5745-10, 5825+10, 80, 6, 20,
- NL80211_RRF_NO_IR),
- /* IEEE 802.11ad (60GHz), channels 1..3 */
- REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
- }
- };
- /* protected by RTNL */
- static const struct ieee80211_regdomain *cfg80211_world_regdom =
- &world_regdom;
- static char *ieee80211_regdom = "00";
- static char user_alpha2[2];
- static const struct ieee80211_regdomain *cfg80211_user_regdom;
- module_param(ieee80211_regdom, charp, 0444);
- MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
- static void reg_free_request(struct regulatory_request *request)
- {
- if (request == &core_request_world)
- return;
- if (request != get_last_request())
- kfree(request);
- }
- static void reg_free_last_request(void)
- {
- struct regulatory_request *lr = get_last_request();
- if (lr != &core_request_world && lr)
- kfree_rcu(lr, rcu_head);
- }
- static void reg_update_last_request(struct regulatory_request *request)
- {
- struct regulatory_request *lr;
- lr = get_last_request();
- if (lr == request)
- return;
- reg_free_last_request();
- rcu_assign_pointer(last_request, request);
- }
- static void reset_regdomains(bool full_reset,
- const struct ieee80211_regdomain *new_regdom)
- {
- const struct ieee80211_regdomain *r;
- ASSERT_RTNL();
- r = get_cfg80211_regdom();
- /* avoid freeing static information or freeing something twice */
- if (r == cfg80211_world_regdom)
- r = NULL;
- if (cfg80211_world_regdom == &world_regdom)
- cfg80211_world_regdom = NULL;
- if (r == &world_regdom)
- r = NULL;
- rcu_free_regdom(r);
- rcu_free_regdom(cfg80211_world_regdom);
- cfg80211_world_regdom = &world_regdom;
- rcu_assign_pointer(cfg80211_regdomain, new_regdom);
- if (!full_reset)
- return;
- reg_update_last_request(&core_request_world);
- }
- /*
- * Dynamic world regulatory domain requested by the wireless
- * core upon initialization
- */
- static void update_world_regdomain(const struct ieee80211_regdomain *rd)
- {
- struct regulatory_request *lr;
- lr = get_last_request();
- WARN_ON(!lr);
- reset_regdomains(false, rd);
- cfg80211_world_regdom = rd;
- }
- bool is_world_regdom(const char *alpha2)
- {
- if (!alpha2)
- return false;
- return alpha2[0] == '0' && alpha2[1] == '0';
- }
- static bool is_alpha2_set(const char *alpha2)
- {
- if (!alpha2)
- return false;
- return alpha2[0] && alpha2[1];
- }
- static bool is_unknown_alpha2(const char *alpha2)
- {
- if (!alpha2)
- return false;
- /*
- * Special case where regulatory domain was built by driver
- * but a specific alpha2 cannot be determined
- */
- return alpha2[0] == '9' && alpha2[1] == '9';
- }
- static bool is_intersected_alpha2(const char *alpha2)
- {
- if (!alpha2)
- return false;
- /*
- * Special case where regulatory domain is the
- * result of an intersection between two regulatory domain
- * structures
- */
- return alpha2[0] == '9' && alpha2[1] == '8';
- }
- static bool is_an_alpha2(const char *alpha2)
- {
- if (!alpha2)
- return false;
- return isalpha(alpha2[0]) && isalpha(alpha2[1]);
- }
- static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
- {
- if (!alpha2_x || !alpha2_y)
- return false;
- return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
- }
- static bool regdom_changes(const char *alpha2)
- {
- const struct ieee80211_regdomain *r = get_cfg80211_regdom();
- if (!r)
- return true;
- return !alpha2_equal(r->alpha2, alpha2);
- }
- /*
- * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
- * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
- * has ever been issued.
- */
- static bool is_user_regdom_saved(void)
- {
- if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
- return false;
- /* This would indicate a mistake on the design */
- if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
- "Unexpected user alpha2: %c%c\n",
- user_alpha2[0], user_alpha2[1]))
- return false;
- return true;
- }
- static const struct ieee80211_regdomain *
- reg_copy_regd(const struct ieee80211_regdomain *src_regd)
- {
- struct ieee80211_regdomain *regd;
- unsigned int i;
- regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
- GFP_KERNEL);
- if (!regd)
- return ERR_PTR(-ENOMEM);
- memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
- for (i = 0; i < src_regd->n_reg_rules; i++)
- memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
- sizeof(struct ieee80211_reg_rule));
- return regd;
- }
- static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
- {
- ASSERT_RTNL();
- if (!IS_ERR(cfg80211_user_regdom))
- kfree(cfg80211_user_regdom);
- cfg80211_user_regdom = reg_copy_regd(rd);
- }
- struct reg_regdb_apply_request {
- struct list_head list;
- const struct ieee80211_regdomain *regdom;
- };
- static LIST_HEAD(reg_regdb_apply_list);
- static DEFINE_MUTEX(reg_regdb_apply_mutex);
- static void reg_regdb_apply(struct work_struct *work)
- {
- struct reg_regdb_apply_request *request;
- rtnl_lock();
- mutex_lock(®_regdb_apply_mutex);
- while (!list_empty(®_regdb_apply_list)) {
- request = list_first_entry(®_regdb_apply_list,
- struct reg_regdb_apply_request,
- list);
- list_del(&request->list);
- set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
- kfree(request);
- }
- mutex_unlock(®_regdb_apply_mutex);
- rtnl_unlock();
- }
- static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
- static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
- {
- struct reg_regdb_apply_request *request;
- request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
- if (!request) {
- kfree(regdom);
- return -ENOMEM;
- }
- request->regdom = regdom;
- mutex_lock(®_regdb_apply_mutex);
- list_add_tail(&request->list, ®_regdb_apply_list);
- mutex_unlock(®_regdb_apply_mutex);
- schedule_work(®_regdb_work);
- return 0;
- }
- #ifdef CONFIG_CFG80211_CRDA_SUPPORT
- /* Max number of consecutive attempts to communicate with CRDA */
- #define REG_MAX_CRDA_TIMEOUTS 10
- static u32 reg_crda_timeouts;
- static void crda_timeout_work(struct work_struct *work);
- static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
- static void crda_timeout_work(struct work_struct *work)
- {
- pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
- rtnl_lock();
- reg_crda_timeouts++;
- restore_regulatory_settings(true, false);
- rtnl_unlock();
- }
- static void cancel_crda_timeout(void)
- {
- cancel_delayed_work(&crda_timeout);
- }
- static void cancel_crda_timeout_sync(void)
- {
- cancel_delayed_work_sync(&crda_timeout);
- }
- static void reset_crda_timeouts(void)
- {
- reg_crda_timeouts = 0;
- }
- /*
- * This lets us keep regulatory code which is updated on a regulatory
- * basis in userspace.
- */
- static int call_crda(const char *alpha2)
- {
- char country[12];
- char *env[] = { country, NULL };
- int ret;
- snprintf(country, sizeof(country), "COUNTRY=%c%c",
- alpha2[0], alpha2[1]);
- if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
- pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
- return -EINVAL;
- }
- if (!is_world_regdom((char *) alpha2))
- pr_debug("Calling CRDA for country: %c%c\n",
- alpha2[0], alpha2[1]);
- else
- pr_debug("Calling CRDA to update world regulatory domain\n");
- ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
- if (ret)
- return ret;
- queue_delayed_work(system_power_efficient_wq,
- &crda_timeout, msecs_to_jiffies(3142));
- return 0;
- }
- #else
- static inline void cancel_crda_timeout(void) {}
- static inline void cancel_crda_timeout_sync(void) {}
- static inline void reset_crda_timeouts(void) {}
- static inline int call_crda(const char *alpha2)
- {
- return -ENODATA;
- }
- #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
- /* code to directly load a firmware database through request_firmware */
- static const struct fwdb_header *regdb;
- struct fwdb_country {
- u8 alpha2[2];
- __be16 coll_ptr;
- /* this struct cannot be extended */
- } __packed __aligned(4);
- struct fwdb_collection {
- u8 len;
- u8 n_rules;
- u8 dfs_region;
- /* no optional data yet */
- /* aligned to 2, then followed by __be16 array of rule pointers */
- } __packed __aligned(4);
- enum fwdb_flags {
- FWDB_FLAG_NO_OFDM = BIT(0),
- FWDB_FLAG_NO_OUTDOOR = BIT(1),
- FWDB_FLAG_DFS = BIT(2),
- FWDB_FLAG_NO_IR = BIT(3),
- FWDB_FLAG_AUTO_BW = BIT(4),
- };
- struct fwdb_wmm_ac {
- u8 ecw;
- u8 aifsn;
- __be16 cot;
- } __packed;
- struct fwdb_wmm_rule {
- struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
- struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
- } __packed;
- struct fwdb_rule {
- u8 len;
- u8 flags;
- __be16 max_eirp;
- __be32 start, end, max_bw;
- /* start of optional data */
- __be16 cac_timeout;
- __be16 wmm_ptr;
- } __packed __aligned(4);
- #define FWDB_MAGIC 0x52474442
- #define FWDB_VERSION 20
- struct fwdb_header {
- __be32 magic;
- __be32 version;
- struct fwdb_country country[];
- } __packed __aligned(4);
- static int ecw2cw(int ecw)
- {
- return (1 << ecw) - 1;
- }
- static bool valid_wmm(struct fwdb_wmm_rule *rule)
- {
- struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
- int i;
- for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
- u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
- u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
- u8 aifsn = ac[i].aifsn;
- if (cw_min >= cw_max)
- return false;
- if (aifsn < 1)
- return false;
- }
- return true;
- }
- static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
- {
- struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
- if ((u8 *)rule + sizeof(rule->len) > data + size)
- return false;
- /* mandatory fields */
- if (rule->len < offsetofend(struct fwdb_rule, max_bw))
- return false;
- if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
- u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
- struct fwdb_wmm_rule *wmm;
- if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
- return false;
- wmm = (void *)(data + wmm_ptr);
- if (!valid_wmm(wmm))
- return false;
- }
- return true;
- }
- static bool valid_country(const u8 *data, unsigned int size,
- const struct fwdb_country *country)
- {
- unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
- struct fwdb_collection *coll = (void *)(data + ptr);
- __be16 *rules_ptr;
- unsigned int i;
- /* make sure we can read len/n_rules */
- if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
- return false;
- /* make sure base struct and all rules fit */
- if ((u8 *)coll + ALIGN(coll->len, 2) +
- (coll->n_rules * 2) > data + size)
- return false;
- /* mandatory fields must exist */
- if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
- return false;
- rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
- for (i = 0; i < coll->n_rules; i++) {
- u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
- if (!valid_rule(data, size, rule_ptr))
- return false;
- }
- return true;
- }
- #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
- static struct key *builtin_regdb_keys;
- static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
- {
- const u8 *end = p + buflen;
- size_t plen;
- key_ref_t key;
- while (p < end) {
- /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
- * than 256 bytes in size.
- */
- if (end - p < 4)
- goto dodgy_cert;
- if (p[0] != 0x30 &&
- p[1] != 0x82)
- goto dodgy_cert;
- plen = (p[2] << 8) | p[3];
- plen += 4;
- if (plen > end - p)
- goto dodgy_cert;
- key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
- "asymmetric", NULL, p, plen,
- ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ),
- KEY_ALLOC_NOT_IN_QUOTA |
- KEY_ALLOC_BUILT_IN |
- KEY_ALLOC_BYPASS_RESTRICTION);
- if (IS_ERR(key)) {
- pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
- PTR_ERR(key));
- } else {
- pr_notice("Loaded X.509 cert '%s'\n",
- key_ref_to_ptr(key)->description);
- key_ref_put(key);
- }
- p += plen;
- }
- return;
- dodgy_cert:
- pr_err("Problem parsing in-kernel X.509 certificate list\n");
- }
- static int __init load_builtin_regdb_keys(void)
- {
- builtin_regdb_keys =
- keyring_alloc(".builtin_regdb_keys",
- KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
- ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
- KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
- KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
- if (IS_ERR(builtin_regdb_keys))
- return PTR_ERR(builtin_regdb_keys);
- pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
- #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
- load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
- #endif
- #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
- if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
- load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
- #endif
- return 0;
- }
- MODULE_FIRMWARE("regulatory.db.p7s");
- static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
- {
- const struct firmware *sig;
- bool result;
- if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev))
- return false;
- result = verify_pkcs7_signature(data, size, sig->data, sig->size,
- builtin_regdb_keys,
- VERIFYING_UNSPECIFIED_SIGNATURE,
- NULL, NULL) == 0;
- release_firmware(sig);
- return result;
- }
- static void free_regdb_keyring(void)
- {
- key_put(builtin_regdb_keys);
- }
- #else
- static int load_builtin_regdb_keys(void)
- {
- return 0;
- }
- static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
- {
- return true;
- }
- static void free_regdb_keyring(void)
- {
- }
- #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
- static bool valid_regdb(const u8 *data, unsigned int size)
- {
- const struct fwdb_header *hdr = (void *)data;
- const struct fwdb_country *country;
- if (size < sizeof(*hdr))
- return false;
- if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
- return false;
- if (hdr->version != cpu_to_be32(FWDB_VERSION))
- return false;
- if (!regdb_has_valid_signature(data, size))
- return false;
- country = &hdr->country[0];
- while ((u8 *)(country + 1) <= data + size) {
- if (!country->coll_ptr)
- break;
- if (!valid_country(data, size, country))
- return false;
- country++;
- }
- return true;
- }
- static void set_wmm_rule(const struct fwdb_header *db,
- const struct fwdb_country *country,
- const struct fwdb_rule *rule,
- struct ieee80211_reg_rule *rrule)
- {
- struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
- struct fwdb_wmm_rule *wmm;
- unsigned int i, wmm_ptr;
- wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
- wmm = (void *)((u8 *)db + wmm_ptr);
- if (!valid_wmm(wmm)) {
- pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
- be32_to_cpu(rule->start), be32_to_cpu(rule->end),
- country->alpha2[0], country->alpha2[1]);
- return;
- }
- for (i = 0; i < IEEE80211_NUM_ACS; i++) {
- wmm_rule->client[i].cw_min =
- ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
- wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
- wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
- wmm_rule->client[i].cot =
- 1000 * be16_to_cpu(wmm->client[i].cot);
- wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
- wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
- wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
- wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
- }
- rrule->has_wmm = true;
- }
- static int __regdb_query_wmm(const struct fwdb_header *db,
- const struct fwdb_country *country, int freq,
- struct ieee80211_reg_rule *rrule)
- {
- unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
- struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
- int i;
- for (i = 0; i < coll->n_rules; i++) {
- __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
- unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
- struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
- if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
- continue;
- if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
- freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
- set_wmm_rule(db, country, rule, rrule);
- return 0;
- }
- }
- return -ENODATA;
- }
- int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
- {
- const struct fwdb_header *hdr = regdb;
- const struct fwdb_country *country;
- if (!regdb)
- return -ENODATA;
- if (IS_ERR(regdb))
- return PTR_ERR(regdb);
- country = &hdr->country[0];
- while (country->coll_ptr) {
- if (alpha2_equal(alpha2, country->alpha2))
- return __regdb_query_wmm(regdb, country, freq, rule);
- country++;
- }
- return -ENODATA;
- }
- EXPORT_SYMBOL(reg_query_regdb_wmm);
- static int regdb_query_country(const struct fwdb_header *db,
- const struct fwdb_country *country)
- {
- unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
- struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
- struct ieee80211_regdomain *regdom;
- unsigned int i;
- regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
- GFP_KERNEL);
- if (!regdom)
- return -ENOMEM;
- regdom->n_reg_rules = coll->n_rules;
- regdom->alpha2[0] = country->alpha2[0];
- regdom->alpha2[1] = country->alpha2[1];
- regdom->dfs_region = coll->dfs_region;
- for (i = 0; i < regdom->n_reg_rules; i++) {
- __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
- unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
- struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
- struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i];
- rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
- rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
- rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
- rrule->power_rule.max_antenna_gain = 0;
- rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
- rrule->flags = 0;
- if (rule->flags & FWDB_FLAG_NO_OFDM)
- rrule->flags |= NL80211_RRF_NO_OFDM;
- if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
- rrule->flags |= NL80211_RRF_NO_OUTDOOR;
- if (rule->flags & FWDB_FLAG_DFS)
- rrule->flags |= NL80211_RRF_DFS;
- if (rule->flags & FWDB_FLAG_NO_IR)
- rrule->flags |= NL80211_RRF_NO_IR;
- if (rule->flags & FWDB_FLAG_AUTO_BW)
- rrule->flags |= NL80211_RRF_AUTO_BW;
- rrule->dfs_cac_ms = 0;
- /* handle optional data */
- if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
- rrule->dfs_cac_ms =
- 1000 * be16_to_cpu(rule->cac_timeout);
- if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
- set_wmm_rule(db, country, rule, rrule);
- }
- return reg_schedule_apply(regdom);
- }
- static int query_regdb(const char *alpha2)
- {
- const struct fwdb_header *hdr = regdb;
- const struct fwdb_country *country;
- ASSERT_RTNL();
- if (IS_ERR(regdb))
- return PTR_ERR(regdb);
- country = &hdr->country[0];
- while (country->coll_ptr) {
- if (alpha2_equal(alpha2, country->alpha2))
- return regdb_query_country(regdb, country);
- country++;
- }
- return -ENODATA;
- }
- static void regdb_fw_cb(const struct firmware *fw, void *context)
- {
- int set_error = 0;
- bool restore = true;
- void *db;
- if (!fw) {
- pr_info("failed to load regulatory.db\n");
- set_error = -ENODATA;
- } else if (!valid_regdb(fw->data, fw->size)) {
- pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
- set_error = -EINVAL;
- }
- rtnl_lock();
- if (regdb && !IS_ERR(regdb)) {
- /* negative case - a bug
- * positive case - can happen due to race in case of multiple cb's in
- * queue, due to usage of asynchronous callback
- *
- * Either case, just restore and free new db.
- */
- } else if (set_error) {
- regdb = ERR_PTR(set_error);
- } else if (fw) {
- db = kmemdup(fw->data, fw->size, GFP_KERNEL);
- if (db) {
- regdb = db;
- restore = context && query_regdb(context);
- } else {
- restore = true;
- }
- }
- if (restore)
- restore_regulatory_settings(true, false);
- rtnl_unlock();
- kfree(context);
- release_firmware(fw);
- }
- MODULE_FIRMWARE("regulatory.db");
- static int query_regdb_file(const char *alpha2)
- {
- int err;
- ASSERT_RTNL();
- if (regdb)
- return query_regdb(alpha2);
- alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
- if (!alpha2)
- return -ENOMEM;
- err = request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
- ®_pdev->dev, GFP_KERNEL,
- (void *)alpha2, regdb_fw_cb);
- if (err)
- kfree(alpha2);
- return err;
- }
- int reg_reload_regdb(void)
- {
- const struct firmware *fw;
- void *db;
- int err;
- const struct ieee80211_regdomain *current_regdomain;
- struct regulatory_request *request;
- err = request_firmware(&fw, "regulatory.db", ®_pdev->dev);
- if (err)
- return err;
- if (!valid_regdb(fw->data, fw->size)) {
- err = -ENODATA;
- goto out;
- }
- db = kmemdup(fw->data, fw->size, GFP_KERNEL);
- if (!db) {
- err = -ENOMEM;
- goto out;
- }
- rtnl_lock();
- if (!IS_ERR_OR_NULL(regdb))
- kfree(regdb);
- regdb = db;
- /* reset regulatory domain */
- current_regdomain = get_cfg80211_regdom();
- request = kzalloc(sizeof(*request), GFP_KERNEL);
- if (!request) {
- err = -ENOMEM;
- goto out_unlock;
- }
- request->wiphy_idx = WIPHY_IDX_INVALID;
- request->alpha2[0] = current_regdomain->alpha2[0];
- request->alpha2[1] = current_regdomain->alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_CORE;
- request->user_reg_hint_type = NL80211_USER_REG_HINT_USER;
- reg_process_hint(request);
- out_unlock:
- rtnl_unlock();
- out:
- release_firmware(fw);
- return err;
- }
- static bool reg_query_database(struct regulatory_request *request)
- {
- if (query_regdb_file(request->alpha2) == 0)
- return true;
- if (call_crda(request->alpha2) == 0)
- return true;
- return false;
- }
- bool reg_is_valid_request(const char *alpha2)
- {
- struct regulatory_request *lr = get_last_request();
- if (!lr || lr->processed)
- return false;
- return alpha2_equal(lr->alpha2, alpha2);
- }
- static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
- {
- struct regulatory_request *lr = get_last_request();
- /*
- * Follow the driver's regulatory domain, if present, unless a country
- * IE has been processed or a user wants to help complaince further
- */
- if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- lr->initiator != NL80211_REGDOM_SET_BY_USER &&
- wiphy->regd)
- return get_wiphy_regdom(wiphy);
- return get_cfg80211_regdom();
- }
- static unsigned int
- reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
- const struct ieee80211_reg_rule *rule)
- {
- const struct ieee80211_freq_range *freq_range = &rule->freq_range;
- const struct ieee80211_freq_range *freq_range_tmp;
- const struct ieee80211_reg_rule *tmp;
- u32 start_freq, end_freq, idx, no;
- for (idx = 0; idx < rd->n_reg_rules; idx++)
- if (rule == &rd->reg_rules[idx])
- break;
- if (idx == rd->n_reg_rules)
- return 0;
- /* get start_freq */
- no = idx;
- while (no) {
- tmp = &rd->reg_rules[--no];
- freq_range_tmp = &tmp->freq_range;
- if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
- break;
- freq_range = freq_range_tmp;
- }
- start_freq = freq_range->start_freq_khz;
- /* get end_freq */
- freq_range = &rule->freq_range;
- no = idx;
- while (no < rd->n_reg_rules - 1) {
- tmp = &rd->reg_rules[++no];
- freq_range_tmp = &tmp->freq_range;
- if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
- break;
- freq_range = freq_range_tmp;
- }
- end_freq = freq_range->end_freq_khz;
- return end_freq - start_freq;
- }
- unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
- const struct ieee80211_reg_rule *rule)
- {
- unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
- if (rule->flags & NL80211_RRF_NO_320MHZ)
- bw = min_t(unsigned int, bw, MHZ_TO_KHZ(160));
- if (rule->flags & NL80211_RRF_NO_160MHZ)
- bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
- if (rule->flags & NL80211_RRF_NO_80MHZ)
- bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
- /*
- * HT40+/HT40- limits are handled per-channel. Only limit BW if both
- * are not allowed.
- */
- if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
- rule->flags & NL80211_RRF_NO_HT40PLUS)
- bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
- return bw;
- }
- /* Sanity check on a regulatory rule */
- static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
- {
- const struct ieee80211_freq_range *freq_range = &rule->freq_range;
- u32 freq_diff;
- if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
- return false;
- if (freq_range->start_freq_khz > freq_range->end_freq_khz)
- return false;
- freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
- if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
- freq_range->max_bandwidth_khz > freq_diff)
- return false;
- return true;
- }
- static bool is_valid_rd(const struct ieee80211_regdomain *rd)
- {
- const struct ieee80211_reg_rule *reg_rule = NULL;
- unsigned int i;
- if (!rd->n_reg_rules)
- return false;
- if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
- return false;
- for (i = 0; i < rd->n_reg_rules; i++) {
- reg_rule = &rd->reg_rules[i];
- if (!is_valid_reg_rule(reg_rule))
- return false;
- }
- return true;
- }
- /**
- * freq_in_rule_band - tells us if a frequency is in a frequency band
- * @freq_range: frequency rule we want to query
- * @freq_khz: frequency we are inquiring about
- *
- * This lets us know if a specific frequency rule is or is not relevant to
- * a specific frequency's band. Bands are device specific and artificial
- * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
- * however it is safe for now to assume that a frequency rule should not be
- * part of a frequency's band if the start freq or end freq are off by more
- * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
- * 60 GHz band.
- * This resolution can be lowered and should be considered as we add
- * regulatory rule support for other "bands".
- **/
- static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
- u32 freq_khz)
- {
- #define ONE_GHZ_IN_KHZ 1000000
- /*
- * From 802.11ad: directional multi-gigabit (DMG):
- * Pertaining to operation in a frequency band containing a channel
- * with the Channel starting frequency above 45 GHz.
- */
- u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
- 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
- if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
- return true;
- if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
- return true;
- return false;
- #undef ONE_GHZ_IN_KHZ
- }
- /*
- * Later on we can perhaps use the more restrictive DFS
- * region but we don't have information for that yet so
- * for now simply disallow conflicts.
- */
- static enum nl80211_dfs_regions
- reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
- const enum nl80211_dfs_regions dfs_region2)
- {
- if (dfs_region1 != dfs_region2)
- return NL80211_DFS_UNSET;
- return dfs_region1;
- }
- static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
- const struct ieee80211_wmm_ac *wmm_ac2,
- struct ieee80211_wmm_ac *intersect)
- {
- intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
- intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
- intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
- intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
- }
- /*
- * Helper for regdom_intersect(), this does the real
- * mathematical intersection fun
- */
- static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
- const struct ieee80211_regdomain *rd2,
- const struct ieee80211_reg_rule *rule1,
- const struct ieee80211_reg_rule *rule2,
- struct ieee80211_reg_rule *intersected_rule)
- {
- const struct ieee80211_freq_range *freq_range1, *freq_range2;
- struct ieee80211_freq_range *freq_range;
- const struct ieee80211_power_rule *power_rule1, *power_rule2;
- struct ieee80211_power_rule *power_rule;
- const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
- struct ieee80211_wmm_rule *wmm_rule;
- u32 freq_diff, max_bandwidth1, max_bandwidth2;
- freq_range1 = &rule1->freq_range;
- freq_range2 = &rule2->freq_range;
- freq_range = &intersected_rule->freq_range;
- power_rule1 = &rule1->power_rule;
- power_rule2 = &rule2->power_rule;
- power_rule = &intersected_rule->power_rule;
- wmm_rule1 = &rule1->wmm_rule;
- wmm_rule2 = &rule2->wmm_rule;
- wmm_rule = &intersected_rule->wmm_rule;
- freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
- freq_range2->start_freq_khz);
- freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
- freq_range2->end_freq_khz);
- max_bandwidth1 = freq_range1->max_bandwidth_khz;
- max_bandwidth2 = freq_range2->max_bandwidth_khz;
- if (rule1->flags & NL80211_RRF_AUTO_BW)
- max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
- if (rule2->flags & NL80211_RRF_AUTO_BW)
- max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
- freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
- intersected_rule->flags = rule1->flags | rule2->flags;
- /*
- * In case NL80211_RRF_AUTO_BW requested for both rules
- * set AUTO_BW in intersected rule also. Next we will
- * calculate BW correctly in handle_channel function.
- * In other case remove AUTO_BW flag while we calculate
- * maximum bandwidth correctly and auto calculation is
- * not required.
- */
- if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
- (rule2->flags & NL80211_RRF_AUTO_BW))
- intersected_rule->flags |= NL80211_RRF_AUTO_BW;
- else
- intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
- freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
- if (freq_range->max_bandwidth_khz > freq_diff)
- freq_range->max_bandwidth_khz = freq_diff;
- power_rule->max_eirp = min(power_rule1->max_eirp,
- power_rule2->max_eirp);
- power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
- power_rule2->max_antenna_gain);
- intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
- rule2->dfs_cac_ms);
- if (rule1->has_wmm && rule2->has_wmm) {
- u8 ac;
- for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
- reg_wmm_rules_intersect(&wmm_rule1->client[ac],
- &wmm_rule2->client[ac],
- &wmm_rule->client[ac]);
- reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
- &wmm_rule2->ap[ac],
- &wmm_rule->ap[ac]);
- }
- intersected_rule->has_wmm = true;
- } else if (rule1->has_wmm) {
- *wmm_rule = *wmm_rule1;
- intersected_rule->has_wmm = true;
- } else if (rule2->has_wmm) {
- *wmm_rule = *wmm_rule2;
- intersected_rule->has_wmm = true;
- } else {
- intersected_rule->has_wmm = false;
- }
- if (!is_valid_reg_rule(intersected_rule))
- return -EINVAL;
- return 0;
- }
- /* check whether old rule contains new rule */
- static bool rule_contains(struct ieee80211_reg_rule *r1,
- struct ieee80211_reg_rule *r2)
- {
- /* for simplicity, currently consider only same flags */
- if (r1->flags != r2->flags)
- return false;
- /* verify r1 is more restrictive */
- if ((r1->power_rule.max_antenna_gain >
- r2->power_rule.max_antenna_gain) ||
- r1->power_rule.max_eirp > r2->power_rule.max_eirp)
- return false;
- /* make sure r2's range is contained within r1 */
- if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
- r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
- return false;
- /* and finally verify that r1.max_bw >= r2.max_bw */
- if (r1->freq_range.max_bandwidth_khz <
- r2->freq_range.max_bandwidth_khz)
- return false;
- return true;
- }
- /* add or extend current rules. do nothing if rule is already contained */
- static void add_rule(struct ieee80211_reg_rule *rule,
- struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
- {
- struct ieee80211_reg_rule *tmp_rule;
- int i;
- for (i = 0; i < *n_rules; i++) {
- tmp_rule = ®_rules[i];
- /* rule is already contained - do nothing */
- if (rule_contains(tmp_rule, rule))
- return;
- /* extend rule if possible */
- if (rule_contains(rule, tmp_rule)) {
- memcpy(tmp_rule, rule, sizeof(*rule));
- return;
- }
- }
- memcpy(®_rules[*n_rules], rule, sizeof(*rule));
- (*n_rules)++;
- }
- /**
- * regdom_intersect - do the intersection between two regulatory domains
- * @rd1: first regulatory domain
- * @rd2: second regulatory domain
- *
- * Use this function to get the intersection between two regulatory domains.
- * Once completed we will mark the alpha2 for the rd as intersected, "98",
- * as no one single alpha2 can represent this regulatory domain.
- *
- * Returns a pointer to the regulatory domain structure which will hold the
- * resulting intersection of rules between rd1 and rd2. We will
- * kzalloc() this structure for you.
- */
- static struct ieee80211_regdomain *
- regdom_intersect(const struct ieee80211_regdomain *rd1,
- const struct ieee80211_regdomain *rd2)
- {
- int r;
- unsigned int x, y;
- unsigned int num_rules = 0;
- const struct ieee80211_reg_rule *rule1, *rule2;
- struct ieee80211_reg_rule intersected_rule;
- struct ieee80211_regdomain *rd;
- if (!rd1 || !rd2)
- return NULL;
- /*
- * First we get a count of the rules we'll need, then we actually
- * build them. This is to so we can malloc() and free() a
- * regdomain once. The reason we use reg_rules_intersect() here
- * is it will return -EINVAL if the rule computed makes no sense.
- * All rules that do check out OK are valid.
- */
- for (x = 0; x < rd1->n_reg_rules; x++) {
- rule1 = &rd1->reg_rules[x];
- for (y = 0; y < rd2->n_reg_rules; y++) {
- rule2 = &rd2->reg_rules[y];
- if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
- &intersected_rule))
- num_rules++;
- }
- }
- if (!num_rules)
- return NULL;
- rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
- if (!rd)
- return NULL;
- for (x = 0; x < rd1->n_reg_rules; x++) {
- rule1 = &rd1->reg_rules[x];
- for (y = 0; y < rd2->n_reg_rules; y++) {
- rule2 = &rd2->reg_rules[y];
- r = reg_rules_intersect(rd1, rd2, rule1, rule2,
- &intersected_rule);
- /*
- * No need to memset here the intersected rule here as
- * we're not using the stack anymore
- */
- if (r)
- continue;
- add_rule(&intersected_rule, rd->reg_rules,
- &rd->n_reg_rules);
- }
- }
- rd->alpha2[0] = '9';
- rd->alpha2[1] = '8';
- rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
- rd2->dfs_region);
- return rd;
- }
- /*
- * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
- * want to just have the channel structure use these
- */
- static u32 map_regdom_flags(u32 rd_flags)
- {
- u32 channel_flags = 0;
- if (rd_flags & NL80211_RRF_NO_IR_ALL)
- channel_flags |= IEEE80211_CHAN_NO_IR;
- if (rd_flags & NL80211_RRF_DFS)
- channel_flags |= IEEE80211_CHAN_RADAR;
- if (rd_flags & NL80211_RRF_NO_OFDM)
- channel_flags |= IEEE80211_CHAN_NO_OFDM;
- if (rd_flags & NL80211_RRF_NO_OUTDOOR)
- channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
- if (rd_flags & NL80211_RRF_IR_CONCURRENT)
- channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
- if (rd_flags & NL80211_RRF_NO_HT40MINUS)
- channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
- if (rd_flags & NL80211_RRF_NO_HT40PLUS)
- channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
- if (rd_flags & NL80211_RRF_NO_80MHZ)
- channel_flags |= IEEE80211_CHAN_NO_80MHZ;
- if (rd_flags & NL80211_RRF_NO_160MHZ)
- channel_flags |= IEEE80211_CHAN_NO_160MHZ;
- if (rd_flags & NL80211_RRF_NO_HE)
- channel_flags |= IEEE80211_CHAN_NO_HE;
- if (rd_flags & NL80211_RRF_NO_320MHZ)
- channel_flags |= IEEE80211_CHAN_NO_320MHZ;
- return channel_flags;
- }
- static const struct ieee80211_reg_rule *
- freq_reg_info_regd(u32 center_freq,
- const struct ieee80211_regdomain *regd, u32 bw)
- {
- int i;
- bool band_rule_found = false;
- bool bw_fits = false;
- if (!regd)
- return ERR_PTR(-EINVAL);
- for (i = 0; i < regd->n_reg_rules; i++) {
- const struct ieee80211_reg_rule *rr;
- const struct ieee80211_freq_range *fr = NULL;
- rr = ®d->reg_rules[i];
- fr = &rr->freq_range;
- /*
- * We only need to know if one frequency rule was
- * in center_freq's band, that's enough, so let's
- * not overwrite it once found
- */
- if (!band_rule_found)
- band_rule_found = freq_in_rule_band(fr, center_freq);
- bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
- if (band_rule_found && bw_fits)
- return rr;
- }
- if (!band_rule_found)
- return ERR_PTR(-ERANGE);
- return ERR_PTR(-EINVAL);
- }
- static const struct ieee80211_reg_rule *
- __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
- {
- const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
- static const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
- const struct ieee80211_reg_rule *reg_rule = ERR_PTR(-ERANGE);
- int i = ARRAY_SIZE(bws) - 1;
- u32 bw;
- for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
- reg_rule = freq_reg_info_regd(center_freq, regd, bw);
- if (!IS_ERR(reg_rule))
- return reg_rule;
- }
- return reg_rule;
- }
- const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
- u32 center_freq)
- {
- u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
- return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
- }
- EXPORT_SYMBOL(freq_reg_info);
- const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
- {
- switch (initiator) {
- case NL80211_REGDOM_SET_BY_CORE:
- return "core";
- case NL80211_REGDOM_SET_BY_USER:
- return "user";
- case NL80211_REGDOM_SET_BY_DRIVER:
- return "driver";
- case NL80211_REGDOM_SET_BY_COUNTRY_IE:
- return "country element";
- default:
- WARN_ON(1);
- return "bug";
- }
- }
- EXPORT_SYMBOL(reg_initiator_name);
- static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
- const struct ieee80211_reg_rule *reg_rule,
- const struct ieee80211_channel *chan)
- {
- const struct ieee80211_freq_range *freq_range = NULL;
- u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
- bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
- freq_range = ®_rule->freq_range;
- max_bandwidth_khz = freq_range->max_bandwidth_khz;
- center_freq_khz = ieee80211_channel_to_khz(chan);
- /* Check if auto calculation requested */
- if (reg_rule->flags & NL80211_RRF_AUTO_BW)
- max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
- /* If we get a reg_rule we can assume that at least 5Mhz fit */
- if (!cfg80211_does_bw_fit_range(freq_range,
- center_freq_khz,
- MHZ_TO_KHZ(10)))
- bw_flags |= IEEE80211_CHAN_NO_10MHZ;
- if (!cfg80211_does_bw_fit_range(freq_range,
- center_freq_khz,
- MHZ_TO_KHZ(20)))
- bw_flags |= IEEE80211_CHAN_NO_20MHZ;
- if (is_s1g) {
- /* S1G is strict about non overlapping channels. We can
- * calculate which bandwidth is allowed per channel by finding
- * the largest bandwidth which cleanly divides the freq_range.
- */
- int edge_offset;
- int ch_bw = max_bandwidth_khz;
- while (ch_bw) {
- edge_offset = (center_freq_khz - ch_bw / 2) -
- freq_range->start_freq_khz;
- if (edge_offset % ch_bw == 0) {
- switch (KHZ_TO_MHZ(ch_bw)) {
- case 1:
- bw_flags |= IEEE80211_CHAN_1MHZ;
- break;
- case 2:
- bw_flags |= IEEE80211_CHAN_2MHZ;
- break;
- case 4:
- bw_flags |= IEEE80211_CHAN_4MHZ;
- break;
- case 8:
- bw_flags |= IEEE80211_CHAN_8MHZ;
- break;
- case 16:
- bw_flags |= IEEE80211_CHAN_16MHZ;
- break;
- default:
- /* If we got here, no bandwidths fit on
- * this frequency, ie. band edge.
- */
- bw_flags |= IEEE80211_CHAN_DISABLED;
- break;
- }
- break;
- }
- ch_bw /= 2;
- }
- } else {
- if (max_bandwidth_khz < MHZ_TO_KHZ(10))
- bw_flags |= IEEE80211_CHAN_NO_10MHZ;
- if (max_bandwidth_khz < MHZ_TO_KHZ(20))
- bw_flags |= IEEE80211_CHAN_NO_20MHZ;
- if (max_bandwidth_khz < MHZ_TO_KHZ(40))
- bw_flags |= IEEE80211_CHAN_NO_HT40;
- if (max_bandwidth_khz < MHZ_TO_KHZ(80))
- bw_flags |= IEEE80211_CHAN_NO_80MHZ;
- if (max_bandwidth_khz < MHZ_TO_KHZ(160))
- bw_flags |= IEEE80211_CHAN_NO_160MHZ;
- if (max_bandwidth_khz < MHZ_TO_KHZ(320))
- bw_flags |= IEEE80211_CHAN_NO_320MHZ;
- }
- return bw_flags;
- }
- static void handle_channel_single_rule(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator,
- struct ieee80211_channel *chan,
- u32 flags,
- struct regulatory_request *lr,
- struct wiphy *request_wiphy,
- const struct ieee80211_reg_rule *reg_rule)
- {
- u32 bw_flags = 0;
- const struct ieee80211_power_rule *power_rule = NULL;
- const struct ieee80211_regdomain *regd;
- regd = reg_get_regdomain(wiphy);
- power_rule = ®_rule->power_rule;
- bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
- if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- request_wiphy && request_wiphy == wiphy &&
- request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
- /*
- * This guarantees the driver's requested regulatory domain
- * will always be used as a base for further regulatory
- * settings
- */
- chan->flags = chan->orig_flags =
- map_regdom_flags(reg_rule->flags) | bw_flags;
- chan->max_antenna_gain = chan->orig_mag =
- (int) MBI_TO_DBI(power_rule->max_antenna_gain);
- chan->max_reg_power = chan->max_power = chan->orig_mpwr =
- (int) MBM_TO_DBM(power_rule->max_eirp);
- if (chan->flags & IEEE80211_CHAN_RADAR) {
- chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
- if (reg_rule->dfs_cac_ms)
- chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
- }
- return;
- }
- chan->dfs_state = NL80211_DFS_USABLE;
- chan->dfs_state_entered = jiffies;
- chan->beacon_found = false;
- chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
- chan->max_antenna_gain =
- min_t(int, chan->orig_mag,
- MBI_TO_DBI(power_rule->max_antenna_gain));
- chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
- if (chan->flags & IEEE80211_CHAN_RADAR) {
- if (reg_rule->dfs_cac_ms)
- chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
- else
- chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
- }
- if (chan->orig_mpwr) {
- /*
- * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
- * will always follow the passed country IE power settings.
- */
- if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
- chan->max_power = chan->max_reg_power;
- else
- chan->max_power = min(chan->orig_mpwr,
- chan->max_reg_power);
- } else
- chan->max_power = chan->max_reg_power;
- }
- static void handle_channel_adjacent_rules(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator,
- struct ieee80211_channel *chan,
- u32 flags,
- struct regulatory_request *lr,
- struct wiphy *request_wiphy,
- const struct ieee80211_reg_rule *rrule1,
- const struct ieee80211_reg_rule *rrule2,
- struct ieee80211_freq_range *comb_range)
- {
- u32 bw_flags1 = 0;
- u32 bw_flags2 = 0;
- const struct ieee80211_power_rule *power_rule1 = NULL;
- const struct ieee80211_power_rule *power_rule2 = NULL;
- const struct ieee80211_regdomain *regd;
- regd = reg_get_regdomain(wiphy);
- power_rule1 = &rrule1->power_rule;
- power_rule2 = &rrule2->power_rule;
- bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
- bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
- if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- request_wiphy && request_wiphy == wiphy &&
- request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
- /* This guarantees the driver's requested regulatory domain
- * will always be used as a base for further regulatory
- * settings
- */
- chan->flags =
- map_regdom_flags(rrule1->flags) |
- map_regdom_flags(rrule2->flags) |
- bw_flags1 |
- bw_flags2;
- chan->orig_flags = chan->flags;
- chan->max_antenna_gain =
- min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
- MBI_TO_DBI(power_rule2->max_antenna_gain));
- chan->orig_mag = chan->max_antenna_gain;
- chan->max_reg_power =
- min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
- MBM_TO_DBM(power_rule2->max_eirp));
- chan->max_power = chan->max_reg_power;
- chan->orig_mpwr = chan->max_reg_power;
- if (chan->flags & IEEE80211_CHAN_RADAR) {
- chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
- if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
- chan->dfs_cac_ms = max_t(unsigned int,
- rrule1->dfs_cac_ms,
- rrule2->dfs_cac_ms);
- }
- return;
- }
- chan->dfs_state = NL80211_DFS_USABLE;
- chan->dfs_state_entered = jiffies;
- chan->beacon_found = false;
- chan->flags = flags | bw_flags1 | bw_flags2 |
- map_regdom_flags(rrule1->flags) |
- map_regdom_flags(rrule2->flags);
- /* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
- * (otherwise no adj. rule case), recheck therefore
- */
- if (cfg80211_does_bw_fit_range(comb_range,
- ieee80211_channel_to_khz(chan),
- MHZ_TO_KHZ(10)))
- chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
- if (cfg80211_does_bw_fit_range(comb_range,
- ieee80211_channel_to_khz(chan),
- MHZ_TO_KHZ(20)))
- chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
- chan->max_antenna_gain =
- min_t(int, chan->orig_mag,
- min_t(int,
- MBI_TO_DBI(power_rule1->max_antenna_gain),
- MBI_TO_DBI(power_rule2->max_antenna_gain)));
- chan->max_reg_power = min_t(int,
- MBM_TO_DBM(power_rule1->max_eirp),
- MBM_TO_DBM(power_rule2->max_eirp));
- if (chan->flags & IEEE80211_CHAN_RADAR) {
- if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
- chan->dfs_cac_ms = max_t(unsigned int,
- rrule1->dfs_cac_ms,
- rrule2->dfs_cac_ms);
- else
- chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
- }
- if (chan->orig_mpwr) {
- /* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
- * will always follow the passed country IE power settings.
- */
- if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
- chan->max_power = chan->max_reg_power;
- else
- chan->max_power = min(chan->orig_mpwr,
- chan->max_reg_power);
- } else {
- chan->max_power = chan->max_reg_power;
- }
- }
- /* Note that right now we assume the desired channel bandwidth
- * is always 20 MHz for each individual channel (HT40 uses 20 MHz
- * per channel, the primary and the extension channel).
- */
- static void handle_channel(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator,
- struct ieee80211_channel *chan)
- {
- const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
- struct regulatory_request *lr = get_last_request();
- struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
- const struct ieee80211_reg_rule *rrule = NULL;
- const struct ieee80211_reg_rule *rrule1 = NULL;
- const struct ieee80211_reg_rule *rrule2 = NULL;
- u32 flags = chan->orig_flags;
- rrule = freq_reg_info(wiphy, orig_chan_freq);
- if (IS_ERR(rrule)) {
- /* check for adjacent match, therefore get rules for
- * chan - 20 MHz and chan + 20 MHz and test
- * if reg rules are adjacent
- */
- rrule1 = freq_reg_info(wiphy,
- orig_chan_freq - MHZ_TO_KHZ(20));
- rrule2 = freq_reg_info(wiphy,
- orig_chan_freq + MHZ_TO_KHZ(20));
- if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
- struct ieee80211_freq_range comb_range;
- if (rrule1->freq_range.end_freq_khz !=
- rrule2->freq_range.start_freq_khz)
- goto disable_chan;
- comb_range.start_freq_khz =
- rrule1->freq_range.start_freq_khz;
- comb_range.end_freq_khz =
- rrule2->freq_range.end_freq_khz;
- comb_range.max_bandwidth_khz =
- min_t(u32,
- rrule1->freq_range.max_bandwidth_khz,
- rrule2->freq_range.max_bandwidth_khz);
- if (!cfg80211_does_bw_fit_range(&comb_range,
- orig_chan_freq,
- MHZ_TO_KHZ(20)))
- goto disable_chan;
- handle_channel_adjacent_rules(wiphy, initiator, chan,
- flags, lr, request_wiphy,
- rrule1, rrule2,
- &comb_range);
- return;
- }
- disable_chan:
- /* We will disable all channels that do not match our
- * received regulatory rule unless the hint is coming
- * from a Country IE and the Country IE had no information
- * about a band. The IEEE 802.11 spec allows for an AP
- * to send only a subset of the regulatory rules allowed,
- * so an AP in the US that only supports 2.4 GHz may only send
- * a country IE with information for the 2.4 GHz band
- * while 5 GHz is still supported.
- */
- if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- PTR_ERR(rrule) == -ERANGE)
- return;
- if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- request_wiphy && request_wiphy == wiphy &&
- request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
- pr_debug("Disabling freq %d.%03d MHz for good\n",
- chan->center_freq, chan->freq_offset);
- chan->orig_flags |= IEEE80211_CHAN_DISABLED;
- chan->flags = chan->orig_flags;
- } else {
- pr_debug("Disabling freq %d.%03d MHz\n",
- chan->center_freq, chan->freq_offset);
- chan->flags |= IEEE80211_CHAN_DISABLED;
- }
- return;
- }
- handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
- request_wiphy, rrule);
- }
- static void handle_band(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator,
- struct ieee80211_supported_band *sband)
- {
- unsigned int i;
- if (!sband)
- return;
- for (i = 0; i < sband->n_channels; i++)
- handle_channel(wiphy, initiator, &sband->channels[i]);
- }
- static bool reg_request_cell_base(struct regulatory_request *request)
- {
- if (request->initiator != NL80211_REGDOM_SET_BY_USER)
- return false;
- return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
- }
- bool reg_last_request_cell_base(void)
- {
- return reg_request_cell_base(get_last_request());
- }
- #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
- /* Core specific check */
- static enum reg_request_treatment
- reg_ignore_cell_hint(struct regulatory_request *pending_request)
- {
- struct regulatory_request *lr = get_last_request();
- if (!reg_num_devs_support_basehint)
- return REG_REQ_IGNORE;
- if (reg_request_cell_base(lr) &&
- !regdom_changes(pending_request->alpha2))
- return REG_REQ_ALREADY_SET;
- return REG_REQ_OK;
- }
- /* Device specific check */
- static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
- {
- return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
- }
- #else
- static enum reg_request_treatment
- reg_ignore_cell_hint(struct regulatory_request *pending_request)
- {
- return REG_REQ_IGNORE;
- }
- static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
- {
- return true;
- }
- #endif
- static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
- {
- if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
- !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
- return true;
- return false;
- }
- static bool ignore_reg_update(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator)
- {
- struct regulatory_request *lr = get_last_request();
- if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
- return true;
- if (!lr) {
- pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
- reg_initiator_name(initiator));
- return true;
- }
- if (initiator == NL80211_REGDOM_SET_BY_CORE &&
- wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
- pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
- reg_initiator_name(initiator));
- return true;
- }
- /*
- * wiphy->regd will be set once the device has its own
- * desired regulatory domain set
- */
- if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
- initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- !is_world_regdom(lr->alpha2)) {
- pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
- reg_initiator_name(initiator));
- return true;
- }
- if (reg_request_cell_base(lr))
- return reg_dev_ignore_cell_hint(wiphy);
- return false;
- }
- static bool reg_is_world_roaming(struct wiphy *wiphy)
- {
- const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
- const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
- struct regulatory_request *lr = get_last_request();
- if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
- return true;
- if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
- return true;
- return false;
- }
- static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
- struct reg_beacon *reg_beacon)
- {
- struct ieee80211_supported_band *sband;
- struct ieee80211_channel *chan;
- bool channel_changed = false;
- struct ieee80211_channel chan_before;
- sband = wiphy->bands[reg_beacon->chan.band];
- chan = &sband->channels[chan_idx];
- if (likely(!ieee80211_channel_equal(chan, ®_beacon->chan)))
- return;
- if (chan->beacon_found)
- return;
- chan->beacon_found = true;
- if (!reg_is_world_roaming(wiphy))
- return;
- if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
- return;
- chan_before = *chan;
- if (chan->flags & IEEE80211_CHAN_NO_IR) {
- chan->flags &= ~IEEE80211_CHAN_NO_IR;
- channel_changed = true;
- }
- if (channel_changed)
- nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
- }
- /*
- * Called when a scan on a wiphy finds a beacon on
- * new channel
- */
- static void wiphy_update_new_beacon(struct wiphy *wiphy,
- struct reg_beacon *reg_beacon)
- {
- unsigned int i;
- struct ieee80211_supported_band *sband;
- if (!wiphy->bands[reg_beacon->chan.band])
- return;
- sband = wiphy->bands[reg_beacon->chan.band];
- for (i = 0; i < sband->n_channels; i++)
- handle_reg_beacon(wiphy, i, reg_beacon);
- }
- /*
- * Called upon reg changes or a new wiphy is added
- */
- static void wiphy_update_beacon_reg(struct wiphy *wiphy)
- {
- unsigned int i;
- struct ieee80211_supported_band *sband;
- struct reg_beacon *reg_beacon;
- list_for_each_entry(reg_beacon, ®_beacon_list, list) {
- if (!wiphy->bands[reg_beacon->chan.band])
- continue;
- sband = wiphy->bands[reg_beacon->chan.band];
- for (i = 0; i < sband->n_channels; i++)
- handle_reg_beacon(wiphy, i, reg_beacon);
- }
- }
- /* Reap the advantages of previously found beacons */
- static void reg_process_beacons(struct wiphy *wiphy)
- {
- /*
- * Means we are just firing up cfg80211, so no beacons would
- * have been processed yet.
- */
- if (!last_request)
- return;
- wiphy_update_beacon_reg(wiphy);
- }
- static bool is_ht40_allowed(struct ieee80211_channel *chan)
- {
- if (!chan)
- return false;
- if (chan->flags & IEEE80211_CHAN_DISABLED)
- return false;
- /* This would happen when regulatory rules disallow HT40 completely */
- if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
- return false;
- return true;
- }
- static void reg_process_ht_flags_channel(struct wiphy *wiphy,
- struct ieee80211_channel *channel)
- {
- struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
- struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
- const struct ieee80211_regdomain *regd;
- unsigned int i;
- u32 flags;
- if (!is_ht40_allowed(channel)) {
- channel->flags |= IEEE80211_CHAN_NO_HT40;
- return;
- }
- /*
- * We need to ensure the extension channels exist to
- * be able to use HT40- or HT40+, this finds them (or not)
- */
- for (i = 0; i < sband->n_channels; i++) {
- struct ieee80211_channel *c = &sband->channels[i];
- if (c->center_freq == (channel->center_freq - 20))
- channel_before = c;
- if (c->center_freq == (channel->center_freq + 20))
- channel_after = c;
- }
- flags = 0;
- regd = get_wiphy_regdom(wiphy);
- if (regd) {
- const struct ieee80211_reg_rule *reg_rule =
- freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
- regd, MHZ_TO_KHZ(20));
- if (!IS_ERR(reg_rule))
- flags = reg_rule->flags;
- }
- /*
- * Please note that this assumes target bandwidth is 20 MHz,
- * if that ever changes we also need to change the below logic
- * to include that as well.
- */
- if (!is_ht40_allowed(channel_before) ||
- flags & NL80211_RRF_NO_HT40MINUS)
- channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
- else
- channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
- if (!is_ht40_allowed(channel_after) ||
- flags & NL80211_RRF_NO_HT40PLUS)
- channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
- else
- channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
- }
- static void reg_process_ht_flags_band(struct wiphy *wiphy,
- struct ieee80211_supported_band *sband)
- {
- unsigned int i;
- if (!sband)
- return;
- for (i = 0; i < sband->n_channels; i++)
- reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
- }
- static void reg_process_ht_flags(struct wiphy *wiphy)
- {
- enum nl80211_band band;
- if (!wiphy)
- return;
- for (band = 0; band < NUM_NL80211_BANDS; band++)
- reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
- }
- static void reg_call_notifier(struct wiphy *wiphy,
- struct regulatory_request *request)
- {
- if (wiphy->reg_notifier)
- wiphy->reg_notifier(wiphy, request);
- }
- static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
- {
- struct cfg80211_chan_def chandef = {};
- struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
- enum nl80211_iftype iftype;
- bool ret;
- int link;
- wdev_lock(wdev);
- iftype = wdev->iftype;
- /* make sure the interface is active */
- if (!wdev->netdev || !netif_running(wdev->netdev))
- goto wdev_inactive_unlock;
- for (link = 0; link < ARRAY_SIZE(wdev->links); link++) {
- struct ieee80211_channel *chan;
- if (!wdev->valid_links && link > 0)
- break;
- if (wdev->valid_links && !(wdev->valid_links & BIT(link)))
- continue;
- switch (iftype) {
- case NL80211_IFTYPE_AP:
- case NL80211_IFTYPE_P2P_GO:
- if (!wdev->links[link].ap.beacon_interval)
- continue;
- chandef = wdev->links[link].ap.chandef;
- break;
- case NL80211_IFTYPE_MESH_POINT:
- if (!wdev->u.mesh.beacon_interval)
- continue;
- chandef = wdev->u.mesh.chandef;
- break;
- case NL80211_IFTYPE_ADHOC:
- if (!wdev->u.ibss.ssid_len)
- continue;
- chandef = wdev->u.ibss.chandef;
- break;
- case NL80211_IFTYPE_STATION:
- case NL80211_IFTYPE_P2P_CLIENT:
- /* Maybe we could consider disabling that link only? */
- if (!wdev->links[link].client.current_bss)
- continue;
- chan = wdev->links[link].client.current_bss->pub.channel;
- if (!chan)
- continue;
- if (!rdev->ops->get_channel ||
- rdev_get_channel(rdev, wdev, link, &chandef))
- cfg80211_chandef_create(&chandef, chan,
- NL80211_CHAN_NO_HT);
- break;
- case NL80211_IFTYPE_MONITOR:
- case NL80211_IFTYPE_AP_VLAN:
- case NL80211_IFTYPE_P2P_DEVICE:
- /* no enforcement required */
- break;
- case NL80211_IFTYPE_OCB:
- if (!wdev->u.ocb.chandef.chan)
- continue;
- chandef = wdev->u.ocb.chandef;
- break;
- case NL80211_IFTYPE_NAN:
- /* we have no info, but NAN is also pretty universal */
- continue;
- default:
- /* others not implemented for now */
- WARN_ON_ONCE(1);
- break;
- }
- wdev_unlock(wdev);
- switch (iftype) {
- case NL80211_IFTYPE_AP:
- case NL80211_IFTYPE_P2P_GO:
- case NL80211_IFTYPE_ADHOC:
- case NL80211_IFTYPE_MESH_POINT:
- ret = cfg80211_reg_can_beacon_relax(wiphy, &chandef,
- iftype);
- if (!ret)
- return ret;
- break;
- case NL80211_IFTYPE_STATION:
- case NL80211_IFTYPE_P2P_CLIENT:
- ret = cfg80211_chandef_usable(wiphy, &chandef,
- IEEE80211_CHAN_DISABLED);
- if (!ret)
- return ret;
- break;
- default:
- break;
- }
- wdev_lock(wdev);
- }
- wdev_unlock(wdev);
- return true;
- wdev_inactive_unlock:
- wdev_unlock(wdev);
- return true;
- }
- static void reg_leave_invalid_chans(struct wiphy *wiphy)
- {
- struct wireless_dev *wdev;
- struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
- wiphy_lock(wiphy);
- list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
- if (!reg_wdev_chan_valid(wiphy, wdev))
- cfg80211_leave(rdev, wdev);
- wiphy_unlock(wiphy);
- }
- static void reg_check_chans_work(struct work_struct *work)
- {
- struct cfg80211_registered_device *rdev;
- pr_debug("Verifying active interfaces after reg change\n");
- rtnl_lock();
- list_for_each_entry(rdev, &cfg80211_rdev_list, list)
- reg_leave_invalid_chans(&rdev->wiphy);
- rtnl_unlock();
- }
- static void reg_check_channels(void)
- {
- /*
- * Give usermode a chance to do something nicer (move to another
- * channel, orderly disconnection), before forcing a disconnection.
- */
- mod_delayed_work(system_power_efficient_wq,
- ®_check_chans,
- msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
- }
- static void wiphy_update_regulatory(struct wiphy *wiphy,
- enum nl80211_reg_initiator initiator)
- {
- enum nl80211_band band;
- struct regulatory_request *lr = get_last_request();
- if (ignore_reg_update(wiphy, initiator)) {
- /*
- * Regulatory updates set by CORE are ignored for custom
- * regulatory cards. Let us notify the changes to the driver,
- * as some drivers used this to restore its orig_* reg domain.
- */
- if (initiator == NL80211_REGDOM_SET_BY_CORE &&
- wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
- !(wiphy->regulatory_flags &
- REGULATORY_WIPHY_SELF_MANAGED))
- reg_call_notifier(wiphy, lr);
- return;
- }
- lr->dfs_region = get_cfg80211_regdom()->dfs_region;
- for (band = 0; band < NUM_NL80211_BANDS; band++)
- handle_band(wiphy, initiator, wiphy->bands[band]);
- reg_process_beacons(wiphy);
- reg_process_ht_flags(wiphy);
- reg_call_notifier(wiphy, lr);
- }
- static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
- {
- struct cfg80211_registered_device *rdev;
- struct wiphy *wiphy;
- ASSERT_RTNL();
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- wiphy = &rdev->wiphy;
- wiphy_update_regulatory(wiphy, initiator);
- }
- reg_check_channels();
- }
- static void handle_channel_custom(struct wiphy *wiphy,
- struct ieee80211_channel *chan,
- const struct ieee80211_regdomain *regd,
- u32 min_bw)
- {
- u32 bw_flags = 0;
- const struct ieee80211_reg_rule *reg_rule = NULL;
- const struct ieee80211_power_rule *power_rule = NULL;
- u32 bw, center_freq_khz;
- center_freq_khz = ieee80211_channel_to_khz(chan);
- for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
- reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
- if (!IS_ERR(reg_rule))
- break;
- }
- if (IS_ERR_OR_NULL(reg_rule)) {
- pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
- chan->center_freq, chan->freq_offset);
- if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
- chan->flags |= IEEE80211_CHAN_DISABLED;
- } else {
- chan->orig_flags |= IEEE80211_CHAN_DISABLED;
- chan->flags = chan->orig_flags;
- }
- return;
- }
- power_rule = ®_rule->power_rule;
- bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
- chan->dfs_state_entered = jiffies;
- chan->dfs_state = NL80211_DFS_USABLE;
- chan->beacon_found = false;
- if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
- chan->flags = chan->orig_flags | bw_flags |
- map_regdom_flags(reg_rule->flags);
- else
- chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
- chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
- chan->max_reg_power = chan->max_power =
- (int) MBM_TO_DBM(power_rule->max_eirp);
- if (chan->flags & IEEE80211_CHAN_RADAR) {
- if (reg_rule->dfs_cac_ms)
- chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
- else
- chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
- }
- chan->max_power = chan->max_reg_power;
- }
- static void handle_band_custom(struct wiphy *wiphy,
- struct ieee80211_supported_band *sband,
- const struct ieee80211_regdomain *regd)
- {
- unsigned int i;
- if (!sband)
- return;
- /*
- * We currently assume that you always want at least 20 MHz,
- * otherwise channel 12 might get enabled if this rule is
- * compatible to US, which permits 2402 - 2472 MHz.
- */
- for (i = 0; i < sband->n_channels; i++)
- handle_channel_custom(wiphy, &sband->channels[i], regd,
- MHZ_TO_KHZ(20));
- }
- /* Used by drivers prior to wiphy registration */
- void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
- const struct ieee80211_regdomain *regd)
- {
- const struct ieee80211_regdomain *new_regd, *tmp;
- enum nl80211_band band;
- unsigned int bands_set = 0;
- WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
- "wiphy should have REGULATORY_CUSTOM_REG\n");
- wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
- for (band = 0; band < NUM_NL80211_BANDS; band++) {
- if (!wiphy->bands[band])
- continue;
- handle_band_custom(wiphy, wiphy->bands[band], regd);
- bands_set++;
- }
- /*
- * no point in calling this if it won't have any effect
- * on your device's supported bands.
- */
- WARN_ON(!bands_set);
- new_regd = reg_copy_regd(regd);
- if (IS_ERR(new_regd))
- return;
- rtnl_lock();
- wiphy_lock(wiphy);
- tmp = get_wiphy_regdom(wiphy);
- rcu_assign_pointer(wiphy->regd, new_regd);
- rcu_free_regdom(tmp);
- wiphy_unlock(wiphy);
- rtnl_unlock();
- }
- EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
- static void reg_set_request_processed(void)
- {
- bool need_more_processing = false;
- struct regulatory_request *lr = get_last_request();
- lr->processed = true;
- spin_lock(®_requests_lock);
- if (!list_empty(®_requests_list))
- need_more_processing = true;
- spin_unlock(®_requests_lock);
- cancel_crda_timeout();
- if (need_more_processing)
- schedule_work(®_work);
- }
- /**
- * reg_process_hint_core - process core regulatory requests
- * @core_request: a pending core regulatory request
- *
- * The wireless subsystem can use this function to process
- * a regulatory request issued by the regulatory core.
- */
- static enum reg_request_treatment
- reg_process_hint_core(struct regulatory_request *core_request)
- {
- if (reg_query_database(core_request)) {
- core_request->intersect = false;
- core_request->processed = false;
- reg_update_last_request(core_request);
- return REG_REQ_OK;
- }
- return REG_REQ_IGNORE;
- }
- static enum reg_request_treatment
- __reg_process_hint_user(struct regulatory_request *user_request)
- {
- struct regulatory_request *lr = get_last_request();
- if (reg_request_cell_base(user_request))
- return reg_ignore_cell_hint(user_request);
- if (reg_request_cell_base(lr))
- return REG_REQ_IGNORE;
- if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
- return REG_REQ_INTERSECT;
- /*
- * If the user knows better the user should set the regdom
- * to their country before the IE is picked up
- */
- if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
- lr->intersect)
- return REG_REQ_IGNORE;
- /*
- * Process user requests only after previous user/driver/core
- * requests have been processed
- */
- if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
- lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
- lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
- regdom_changes(lr->alpha2))
- return REG_REQ_IGNORE;
- if (!regdom_changes(user_request->alpha2))
- return REG_REQ_ALREADY_SET;
- return REG_REQ_OK;
- }
- /**
- * reg_process_hint_user - process user regulatory requests
- * @user_request: a pending user regulatory request
- *
- * The wireless subsystem can use this function to process
- * a regulatory request initiated by userspace.
- */
- static enum reg_request_treatment
- reg_process_hint_user(struct regulatory_request *user_request)
- {
- enum reg_request_treatment treatment;
- treatment = __reg_process_hint_user(user_request);
- if (treatment == REG_REQ_IGNORE ||
- treatment == REG_REQ_ALREADY_SET)
- return REG_REQ_IGNORE;
- user_request->intersect = treatment == REG_REQ_INTERSECT;
- user_request->processed = false;
- if (reg_query_database(user_request)) {
- reg_update_last_request(user_request);
- user_alpha2[0] = user_request->alpha2[0];
- user_alpha2[1] = user_request->alpha2[1];
- return REG_REQ_OK;
- }
- return REG_REQ_IGNORE;
- }
- static enum reg_request_treatment
- __reg_process_hint_driver(struct regulatory_request *driver_request)
- {
- struct regulatory_request *lr = get_last_request();
- if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
- if (regdom_changes(driver_request->alpha2))
- return REG_REQ_OK;
- return REG_REQ_ALREADY_SET;
- }
- /*
- * This would happen if you unplug and plug your card
- * back in or if you add a new device for which the previously
- * loaded card also agrees on the regulatory domain.
- */
- if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
- !regdom_changes(driver_request->alpha2))
- return REG_REQ_ALREADY_SET;
- return REG_REQ_INTERSECT;
- }
- /**
- * reg_process_hint_driver - process driver regulatory requests
- * @wiphy: the wireless device for the regulatory request
- * @driver_request: a pending driver regulatory request
- *
- * The wireless subsystem can use this function to process
- * a regulatory request issued by an 802.11 driver.
- *
- * Returns one of the different reg request treatment values.
- */
- static enum reg_request_treatment
- reg_process_hint_driver(struct wiphy *wiphy,
- struct regulatory_request *driver_request)
- {
- const struct ieee80211_regdomain *regd, *tmp;
- enum reg_request_treatment treatment;
- treatment = __reg_process_hint_driver(driver_request);
- switch (treatment) {
- case REG_REQ_OK:
- break;
- case REG_REQ_IGNORE:
- return REG_REQ_IGNORE;
- case REG_REQ_INTERSECT:
- case REG_REQ_ALREADY_SET:
- regd = reg_copy_regd(get_cfg80211_regdom());
- if (IS_ERR(regd))
- return REG_REQ_IGNORE;
- tmp = get_wiphy_regdom(wiphy);
- ASSERT_RTNL();
- wiphy_lock(wiphy);
- rcu_assign_pointer(wiphy->regd, regd);
- wiphy_unlock(wiphy);
- rcu_free_regdom(tmp);
- }
- driver_request->intersect = treatment == REG_REQ_INTERSECT;
- driver_request->processed = false;
- /*
- * Since CRDA will not be called in this case as we already
- * have applied the requested regulatory domain before we just
- * inform userspace we have processed the request
- */
- if (treatment == REG_REQ_ALREADY_SET) {
- nl80211_send_reg_change_event(driver_request);
- reg_update_last_request(driver_request);
- reg_set_request_processed();
- return REG_REQ_ALREADY_SET;
- }
- if (reg_query_database(driver_request)) {
- reg_update_last_request(driver_request);
- return REG_REQ_OK;
- }
- return REG_REQ_IGNORE;
- }
- static enum reg_request_treatment
- __reg_process_hint_country_ie(struct wiphy *wiphy,
- struct regulatory_request *country_ie_request)
- {
- struct wiphy *last_wiphy = NULL;
- struct regulatory_request *lr = get_last_request();
- if (reg_request_cell_base(lr)) {
- /* Trust a Cell base station over the AP's country IE */
- if (regdom_changes(country_ie_request->alpha2))
- return REG_REQ_IGNORE;
- return REG_REQ_ALREADY_SET;
- } else {
- if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
- return REG_REQ_IGNORE;
- }
- if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
- return -EINVAL;
- if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
- return REG_REQ_OK;
- last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
- if (last_wiphy != wiphy) {
- /*
- * Two cards with two APs claiming different
- * Country IE alpha2s. We could
- * intersect them, but that seems unlikely
- * to be correct. Reject second one for now.
- */
- if (regdom_changes(country_ie_request->alpha2))
- return REG_REQ_IGNORE;
- return REG_REQ_ALREADY_SET;
- }
- if (regdom_changes(country_ie_request->alpha2))
- return REG_REQ_OK;
- return REG_REQ_ALREADY_SET;
- }
- /**
- * reg_process_hint_country_ie - process regulatory requests from country IEs
- * @wiphy: the wireless device for the regulatory request
- * @country_ie_request: a regulatory request from a country IE
- *
- * The wireless subsystem can use this function to process
- * a regulatory request issued by a country Information Element.
- *
- * Returns one of the different reg request treatment values.
- */
- static enum reg_request_treatment
- reg_process_hint_country_ie(struct wiphy *wiphy,
- struct regulatory_request *country_ie_request)
- {
- enum reg_request_treatment treatment;
- treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
- switch (treatment) {
- case REG_REQ_OK:
- break;
- case REG_REQ_IGNORE:
- return REG_REQ_IGNORE;
- case REG_REQ_ALREADY_SET:
- reg_free_request(country_ie_request);
- return REG_REQ_ALREADY_SET;
- case REG_REQ_INTERSECT:
- /*
- * This doesn't happen yet, not sure we
- * ever want to support it for this case.
- */
- WARN_ONCE(1, "Unexpected intersection for country elements");
- return REG_REQ_IGNORE;
- }
- country_ie_request->intersect = false;
- country_ie_request->processed = false;
- if (reg_query_database(country_ie_request)) {
- reg_update_last_request(country_ie_request);
- return REG_REQ_OK;
- }
- return REG_REQ_IGNORE;
- }
- bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
- {
- const struct ieee80211_regdomain *wiphy1_regd = NULL;
- const struct ieee80211_regdomain *wiphy2_regd = NULL;
- const struct ieee80211_regdomain *cfg80211_regd = NULL;
- bool dfs_domain_same;
- rcu_read_lock();
- cfg80211_regd = rcu_dereference(cfg80211_regdomain);
- wiphy1_regd = rcu_dereference(wiphy1->regd);
- if (!wiphy1_regd)
- wiphy1_regd = cfg80211_regd;
- wiphy2_regd = rcu_dereference(wiphy2->regd);
- if (!wiphy2_regd)
- wiphy2_regd = cfg80211_regd;
- dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
- rcu_read_unlock();
- return dfs_domain_same;
- }
- static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
- struct ieee80211_channel *src_chan)
- {
- if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
- !(src_chan->flags & IEEE80211_CHAN_RADAR))
- return;
- if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
- src_chan->flags & IEEE80211_CHAN_DISABLED)
- return;
- if (src_chan->center_freq == dst_chan->center_freq &&
- dst_chan->dfs_state == NL80211_DFS_USABLE) {
- dst_chan->dfs_state = src_chan->dfs_state;
- dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
- }
- }
- static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
- struct wiphy *src_wiphy)
- {
- struct ieee80211_supported_band *src_sband, *dst_sband;
- struct ieee80211_channel *src_chan, *dst_chan;
- int i, j, band;
- if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
- return;
- for (band = 0; band < NUM_NL80211_BANDS; band++) {
- dst_sband = dst_wiphy->bands[band];
- src_sband = src_wiphy->bands[band];
- if (!dst_sband || !src_sband)
- continue;
- for (i = 0; i < dst_sband->n_channels; i++) {
- dst_chan = &dst_sband->channels[i];
- for (j = 0; j < src_sband->n_channels; j++) {
- src_chan = &src_sband->channels[j];
- reg_copy_dfs_chan_state(dst_chan, src_chan);
- }
- }
- }
- }
- static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
- {
- struct cfg80211_registered_device *rdev;
- ASSERT_RTNL();
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- if (wiphy == &rdev->wiphy)
- continue;
- wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
- }
- }
- /* This processes *all* regulatory hints */
- static void reg_process_hint(struct regulatory_request *reg_request)
- {
- struct wiphy *wiphy = NULL;
- enum reg_request_treatment treatment;
- enum nl80211_reg_initiator initiator = reg_request->initiator;
- if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
- wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
- switch (initiator) {
- case NL80211_REGDOM_SET_BY_CORE:
- treatment = reg_process_hint_core(reg_request);
- break;
- case NL80211_REGDOM_SET_BY_USER:
- treatment = reg_process_hint_user(reg_request);
- break;
- case NL80211_REGDOM_SET_BY_DRIVER:
- if (!wiphy)
- goto out_free;
- treatment = reg_process_hint_driver(wiphy, reg_request);
- break;
- case NL80211_REGDOM_SET_BY_COUNTRY_IE:
- if (!wiphy)
- goto out_free;
- treatment = reg_process_hint_country_ie(wiphy, reg_request);
- break;
- default:
- WARN(1, "invalid initiator %d\n", initiator);
- goto out_free;
- }
- if (treatment == REG_REQ_IGNORE)
- goto out_free;
- WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
- "unexpected treatment value %d\n", treatment);
- /* This is required so that the orig_* parameters are saved.
- * NOTE: treatment must be set for any case that reaches here!
- */
- if (treatment == REG_REQ_ALREADY_SET && wiphy &&
- wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
- wiphy_update_regulatory(wiphy, initiator);
- wiphy_all_share_dfs_chan_state(wiphy);
- reg_check_channels();
- }
- return;
- out_free:
- reg_free_request(reg_request);
- }
- static void notify_self_managed_wiphys(struct regulatory_request *request)
- {
- struct cfg80211_registered_device *rdev;
- struct wiphy *wiphy;
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- wiphy = &rdev->wiphy;
- if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
- request->initiator == NL80211_REGDOM_SET_BY_USER)
- reg_call_notifier(wiphy, request);
- }
- }
- /*
- * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
- * Regulatory hints come on a first come first serve basis and we
- * must process each one atomically.
- */
- static void reg_process_pending_hints(void)
- {
- struct regulatory_request *reg_request, *lr;
- lr = get_last_request();
- /* When last_request->processed becomes true this will be rescheduled */
- if (lr && !lr->processed) {
- pr_debug("Pending regulatory request, waiting for it to be processed...\n");
- return;
- }
- spin_lock(®_requests_lock);
- if (list_empty(®_requests_list)) {
- spin_unlock(®_requests_lock);
- return;
- }
- reg_request = list_first_entry(®_requests_list,
- struct regulatory_request,
- list);
- list_del_init(®_request->list);
- spin_unlock(®_requests_lock);
- notify_self_managed_wiphys(reg_request);
- reg_process_hint(reg_request);
- lr = get_last_request();
- spin_lock(®_requests_lock);
- if (!list_empty(®_requests_list) && lr && lr->processed)
- schedule_work(®_work);
- spin_unlock(®_requests_lock);
- }
- /* Processes beacon hints -- this has nothing to do with country IEs */
- static void reg_process_pending_beacon_hints(void)
- {
- struct cfg80211_registered_device *rdev;
- struct reg_beacon *pending_beacon, *tmp;
- /* This goes through the _pending_ beacon list */
- spin_lock_bh(®_pending_beacons_lock);
- list_for_each_entry_safe(pending_beacon, tmp,
- ®_pending_beacons, list) {
- list_del_init(&pending_beacon->list);
- /* Applies the beacon hint to current wiphys */
- list_for_each_entry(rdev, &cfg80211_rdev_list, list)
- wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
- /* Remembers the beacon hint for new wiphys or reg changes */
- list_add_tail(&pending_beacon->list, ®_beacon_list);
- }
- spin_unlock_bh(®_pending_beacons_lock);
- }
- static void reg_process_self_managed_hint(struct wiphy *wiphy)
- {
- struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
- const struct ieee80211_regdomain *tmp;
- const struct ieee80211_regdomain *regd;
- enum nl80211_band band;
- struct regulatory_request request = {};
- ASSERT_RTNL();
- lockdep_assert_wiphy(wiphy);
- spin_lock(®_requests_lock);
- regd = rdev->requested_regd;
- rdev->requested_regd = NULL;
- spin_unlock(®_requests_lock);
- if (!regd)
- return;
- tmp = get_wiphy_regdom(wiphy);
- rcu_assign_pointer(wiphy->regd, regd);
- rcu_free_regdom(tmp);
- for (band = 0; band < NUM_NL80211_BANDS; band++)
- handle_band_custom(wiphy, wiphy->bands[band], regd);
- reg_process_ht_flags(wiphy);
- request.wiphy_idx = get_wiphy_idx(wiphy);
- request.alpha2[0] = regd->alpha2[0];
- request.alpha2[1] = regd->alpha2[1];
- request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
- nl80211_send_wiphy_reg_change_event(&request);
- }
- static void reg_process_self_managed_hints(void)
- {
- struct cfg80211_registered_device *rdev;
- ASSERT_RTNL();
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- wiphy_lock(&rdev->wiphy);
- reg_process_self_managed_hint(&rdev->wiphy);
- wiphy_unlock(&rdev->wiphy);
- }
- reg_check_channels();
- }
- static void reg_todo(struct work_struct *work)
- {
- rtnl_lock();
- reg_process_pending_hints();
- reg_process_pending_beacon_hints();
- reg_process_self_managed_hints();
- rtnl_unlock();
- }
- static void queue_regulatory_request(struct regulatory_request *request)
- {
- request->alpha2[0] = toupper(request->alpha2[0]);
- request->alpha2[1] = toupper(request->alpha2[1]);
- spin_lock(®_requests_lock);
- list_add_tail(&request->list, ®_requests_list);
- spin_unlock(®_requests_lock);
- schedule_work(®_work);
- }
- /*
- * Core regulatory hint -- happens during cfg80211_init()
- * and when we restore regulatory settings.
- */
- static int regulatory_hint_core(const char *alpha2)
- {
- struct regulatory_request *request;
- request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
- if (!request)
- return -ENOMEM;
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_CORE;
- request->wiphy_idx = WIPHY_IDX_INVALID;
- queue_regulatory_request(request);
- return 0;
- }
- /* User hints */
- int regulatory_hint_user(const char *alpha2,
- enum nl80211_user_reg_hint_type user_reg_hint_type)
- {
- struct regulatory_request *request;
- if (WARN_ON(!alpha2))
- return -EINVAL;
- if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
- return -EINVAL;
- request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
- if (!request)
- return -ENOMEM;
- request->wiphy_idx = WIPHY_IDX_INVALID;
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_USER;
- request->user_reg_hint_type = user_reg_hint_type;
- /* Allow calling CRDA again */
- reset_crda_timeouts();
- queue_regulatory_request(request);
- return 0;
- }
- int regulatory_hint_indoor(bool is_indoor, u32 portid)
- {
- spin_lock(®_indoor_lock);
- /* It is possible that more than one user space process is trying to
- * configure the indoor setting. To handle such cases, clear the indoor
- * setting in case that some process does not think that the device
- * is operating in an indoor environment. In addition, if a user space
- * process indicates that it is controlling the indoor setting, save its
- * portid, i.e., make it the owner.
- */
- reg_is_indoor = is_indoor;
- if (reg_is_indoor) {
- if (!reg_is_indoor_portid)
- reg_is_indoor_portid = portid;
- } else {
- reg_is_indoor_portid = 0;
- }
- spin_unlock(®_indoor_lock);
- if (!is_indoor)
- reg_check_channels();
- return 0;
- }
- void regulatory_netlink_notify(u32 portid)
- {
- spin_lock(®_indoor_lock);
- if (reg_is_indoor_portid != portid) {
- spin_unlock(®_indoor_lock);
- return;
- }
- reg_is_indoor = false;
- reg_is_indoor_portid = 0;
- spin_unlock(®_indoor_lock);
- reg_check_channels();
- }
- /* Driver hints */
- int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
- {
- struct regulatory_request *request;
- if (WARN_ON(!alpha2 || !wiphy))
- return -EINVAL;
- wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
- request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
- if (!request)
- return -ENOMEM;
- request->wiphy_idx = get_wiphy_idx(wiphy);
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
- /* Allow calling CRDA again */
- reset_crda_timeouts();
- queue_regulatory_request(request);
- return 0;
- }
- EXPORT_SYMBOL(regulatory_hint);
- void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
- const u8 *country_ie, u8 country_ie_len)
- {
- char alpha2[2];
- enum environment_cap env = ENVIRON_ANY;
- struct regulatory_request *request = NULL, *lr;
- /* IE len must be evenly divisible by 2 */
- if (country_ie_len & 0x01)
- return;
- if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
- return;
- request = kzalloc(sizeof(*request), GFP_KERNEL);
- if (!request)
- return;
- alpha2[0] = country_ie[0];
- alpha2[1] = country_ie[1];
- if (country_ie[2] == 'I')
- env = ENVIRON_INDOOR;
- else if (country_ie[2] == 'O')
- env = ENVIRON_OUTDOOR;
- rcu_read_lock();
- lr = get_last_request();
- if (unlikely(!lr))
- goto out;
- /*
- * We will run this only upon a successful connection on cfg80211.
- * We leave conflict resolution to the workqueue, where can hold
- * the RTNL.
- */
- if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
- lr->wiphy_idx != WIPHY_IDX_INVALID)
- goto out;
- request->wiphy_idx = get_wiphy_idx(wiphy);
- request->alpha2[0] = alpha2[0];
- request->alpha2[1] = alpha2[1];
- request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
- request->country_ie_env = env;
- /* Allow calling CRDA again */
- reset_crda_timeouts();
- queue_regulatory_request(request);
- request = NULL;
- out:
- kfree(request);
- rcu_read_unlock();
- }
- static void restore_alpha2(char *alpha2, bool reset_user)
- {
- /* indicates there is no alpha2 to consider for restoration */
- alpha2[0] = '9';
- alpha2[1] = '7';
- /* The user setting has precedence over the module parameter */
- if (is_user_regdom_saved()) {
- /* Unless we're asked to ignore it and reset it */
- if (reset_user) {
- pr_debug("Restoring regulatory settings including user preference\n");
- user_alpha2[0] = '9';
- user_alpha2[1] = '7';
- /*
- * If we're ignoring user settings, we still need to
- * check the module parameter to ensure we put things
- * back as they were for a full restore.
- */
- if (!is_world_regdom(ieee80211_regdom)) {
- pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
- ieee80211_regdom[0], ieee80211_regdom[1]);
- alpha2[0] = ieee80211_regdom[0];
- alpha2[1] = ieee80211_regdom[1];
- }
- } else {
- pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
- user_alpha2[0], user_alpha2[1]);
- alpha2[0] = user_alpha2[0];
- alpha2[1] = user_alpha2[1];
- }
- } else if (!is_world_regdom(ieee80211_regdom)) {
- pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
- ieee80211_regdom[0], ieee80211_regdom[1]);
- alpha2[0] = ieee80211_regdom[0];
- alpha2[1] = ieee80211_regdom[1];
- } else
- pr_debug("Restoring regulatory settings\n");
- }
- static void restore_custom_reg_settings(struct wiphy *wiphy)
- {
- struct ieee80211_supported_band *sband;
- enum nl80211_band band;
- struct ieee80211_channel *chan;
- int i;
- for (band = 0; band < NUM_NL80211_BANDS; band++) {
- sband = wiphy->bands[band];
- if (!sband)
- continue;
- for (i = 0; i < sband->n_channels; i++) {
- chan = &sband->channels[i];
- chan->flags = chan->orig_flags;
- chan->max_antenna_gain = chan->orig_mag;
- chan->max_power = chan->orig_mpwr;
- chan->beacon_found = false;
- }
- }
- }
- /*
- * Restoring regulatory settings involves ignoring any
- * possibly stale country IE information and user regulatory
- * settings if so desired, this includes any beacon hints
- * learned as we could have traveled outside to another country
- * after disconnection. To restore regulatory settings we do
- * exactly what we did at bootup:
- *
- * - send a core regulatory hint
- * - send a user regulatory hint if applicable
- *
- * Device drivers that send a regulatory hint for a specific country
- * keep their own regulatory domain on wiphy->regd so that does
- * not need to be remembered.
- */
- static void restore_regulatory_settings(bool reset_user, bool cached)
- {
- char alpha2[2];
- char world_alpha2[2];
- struct reg_beacon *reg_beacon, *btmp;
- LIST_HEAD(tmp_reg_req_list);
- struct cfg80211_registered_device *rdev;
- ASSERT_RTNL();
- /*
- * Clear the indoor setting in case that it is not controlled by user
- * space, as otherwise there is no guarantee that the device is still
- * operating in an indoor environment.
- */
- spin_lock(®_indoor_lock);
- if (reg_is_indoor && !reg_is_indoor_portid) {
- reg_is_indoor = false;
- reg_check_channels();
- }
- spin_unlock(®_indoor_lock);
- reset_regdomains(true, &world_regdom);
- restore_alpha2(alpha2, reset_user);
- /*
- * If there's any pending requests we simply
- * stash them to a temporary pending queue and
- * add then after we've restored regulatory
- * settings.
- */
- spin_lock(®_requests_lock);
- list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
- spin_unlock(®_requests_lock);
- /* Clear beacon hints */
- spin_lock_bh(®_pending_beacons_lock);
- list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
- list_del(®_beacon->list);
- kfree(reg_beacon);
- }
- spin_unlock_bh(®_pending_beacons_lock);
- list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
- list_del(®_beacon->list);
- kfree(reg_beacon);
- }
- /* First restore to the basic regulatory settings */
- world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
- world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
- continue;
- if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
- restore_custom_reg_settings(&rdev->wiphy);
- }
- if (cached && (!is_an_alpha2(alpha2) ||
- !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
- reset_regdomains(false, cfg80211_world_regdom);
- update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
- print_regdomain(get_cfg80211_regdom());
- nl80211_send_reg_change_event(&core_request_world);
- reg_set_request_processed();
- if (is_an_alpha2(alpha2) &&
- !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
- struct regulatory_request *ureq;
- spin_lock(®_requests_lock);
- ureq = list_last_entry(®_requests_list,
- struct regulatory_request,
- list);
- list_del(&ureq->list);
- spin_unlock(®_requests_lock);
- notify_self_managed_wiphys(ureq);
- reg_update_last_request(ureq);
- set_regdom(reg_copy_regd(cfg80211_user_regdom),
- REGD_SOURCE_CACHED);
- }
- } else {
- regulatory_hint_core(world_alpha2);
- /*
- * This restores the ieee80211_regdom module parameter
- * preference or the last user requested regulatory
- * settings, user regulatory settings takes precedence.
- */
- if (is_an_alpha2(alpha2))
- regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
- }
- spin_lock(®_requests_lock);
- list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
- spin_unlock(®_requests_lock);
- pr_debug("Kicking the queue\n");
- schedule_work(®_work);
- }
- static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
- {
- struct cfg80211_registered_device *rdev;
- struct wireless_dev *wdev;
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
- wdev_lock(wdev);
- if (!(wdev->wiphy->regulatory_flags & flag)) {
- wdev_unlock(wdev);
- return false;
- }
- wdev_unlock(wdev);
- }
- }
- return true;
- }
- void regulatory_hint_disconnect(void)
- {
- /* Restore of regulatory settings is not required when wiphy(s)
- * ignore IE from connected access point but clearance of beacon hints
- * is required when wiphy(s) supports beacon hints.
- */
- if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
- struct reg_beacon *reg_beacon, *btmp;
- if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
- return;
- spin_lock_bh(®_pending_beacons_lock);
- list_for_each_entry_safe(reg_beacon, btmp,
- ®_pending_beacons, list) {
- list_del(®_beacon->list);
- kfree(reg_beacon);
- }
- spin_unlock_bh(®_pending_beacons_lock);
- list_for_each_entry_safe(reg_beacon, btmp,
- ®_beacon_list, list) {
- list_del(®_beacon->list);
- kfree(reg_beacon);
- }
- return;
- }
- pr_debug("All devices are disconnected, going to restore regulatory settings\n");
- restore_regulatory_settings(false, true);
- }
- static bool freq_is_chan_12_13_14(u32 freq)
- {
- if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
- freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
- freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
- return true;
- return false;
- }
- static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
- {
- struct reg_beacon *pending_beacon;
- list_for_each_entry(pending_beacon, ®_pending_beacons, list)
- if (ieee80211_channel_equal(beacon_chan,
- &pending_beacon->chan))
- return true;
- return false;
- }
- int regulatory_hint_found_beacon(struct wiphy *wiphy,
- struct ieee80211_channel *beacon_chan,
- gfp_t gfp)
- {
- struct reg_beacon *reg_beacon;
- bool processing;
- if (beacon_chan->beacon_found ||
- beacon_chan->flags & IEEE80211_CHAN_RADAR ||
- (beacon_chan->band == NL80211_BAND_2GHZ &&
- !freq_is_chan_12_13_14(beacon_chan->center_freq)))
- return 0;
- spin_lock_bh(®_pending_beacons_lock);
- processing = pending_reg_beacon(beacon_chan);
- spin_unlock_bh(®_pending_beacons_lock);
- if (processing)
- return 0;
- reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
- if (!reg_beacon)
- return -ENOMEM;
- pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
- beacon_chan->center_freq, beacon_chan->freq_offset,
- ieee80211_freq_khz_to_channel(
- ieee80211_channel_to_khz(beacon_chan)),
- wiphy_name(wiphy));
- memcpy(®_beacon->chan, beacon_chan,
- sizeof(struct ieee80211_channel));
- /*
- * Since we can be called from BH or and non-BH context
- * we must use spin_lock_bh()
- */
- spin_lock_bh(®_pending_beacons_lock);
- list_add_tail(®_beacon->list, ®_pending_beacons);
- spin_unlock_bh(®_pending_beacons_lock);
- schedule_work(®_work);
- return 0;
- }
- static void print_rd_rules(const struct ieee80211_regdomain *rd)
- {
- unsigned int i;
- const struct ieee80211_reg_rule *reg_rule = NULL;
- const struct ieee80211_freq_range *freq_range = NULL;
- const struct ieee80211_power_rule *power_rule = NULL;
- char bw[32], cac_time[32];
- pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
- for (i = 0; i < rd->n_reg_rules; i++) {
- reg_rule = &rd->reg_rules[i];
- freq_range = ®_rule->freq_range;
- power_rule = ®_rule->power_rule;
- if (reg_rule->flags & NL80211_RRF_AUTO_BW)
- snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
- freq_range->max_bandwidth_khz,
- reg_get_max_bandwidth(rd, reg_rule));
- else
- snprintf(bw, sizeof(bw), "%d KHz",
- freq_range->max_bandwidth_khz);
- if (reg_rule->flags & NL80211_RRF_DFS)
- scnprintf(cac_time, sizeof(cac_time), "%u s",
- reg_rule->dfs_cac_ms/1000);
- else
- scnprintf(cac_time, sizeof(cac_time), "N/A");
- /*
- * There may not be documentation for max antenna gain
- * in certain regions
- */
- if (power_rule->max_antenna_gain)
- pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- bw,
- power_rule->max_antenna_gain,
- power_rule->max_eirp,
- cac_time);
- else
- pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
- freq_range->start_freq_khz,
- freq_range->end_freq_khz,
- bw,
- power_rule->max_eirp,
- cac_time);
- }
- }
- bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
- {
- switch (dfs_region) {
- case NL80211_DFS_UNSET:
- case NL80211_DFS_FCC:
- case NL80211_DFS_ETSI:
- case NL80211_DFS_JP:
- return true;
- default:
- pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
- return false;
- }
- }
- static void print_regdomain(const struct ieee80211_regdomain *rd)
- {
- struct regulatory_request *lr = get_last_request();
- if (is_intersected_alpha2(rd->alpha2)) {
- if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
- struct cfg80211_registered_device *rdev;
- rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
- if (rdev) {
- pr_debug("Current regulatory domain updated by AP to: %c%c\n",
- rdev->country_ie_alpha2[0],
- rdev->country_ie_alpha2[1]);
- } else
- pr_debug("Current regulatory domain intersected:\n");
- } else
- pr_debug("Current regulatory domain intersected:\n");
- } else if (is_world_regdom(rd->alpha2)) {
- pr_debug("World regulatory domain updated:\n");
- } else {
- if (is_unknown_alpha2(rd->alpha2))
- pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
- else {
- if (reg_request_cell_base(lr))
- pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
- rd->alpha2[0], rd->alpha2[1]);
- else
- pr_debug("Regulatory domain changed to country: %c%c\n",
- rd->alpha2[0], rd->alpha2[1]);
- }
- }
- pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
- print_rd_rules(rd);
- }
- static void print_regdomain_info(const struct ieee80211_regdomain *rd)
- {
- pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
- print_rd_rules(rd);
- }
- static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
- {
- if (!is_world_regdom(rd->alpha2))
- return -EINVAL;
- update_world_regdomain(rd);
- return 0;
- }
- static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
- struct regulatory_request *user_request)
- {
- const struct ieee80211_regdomain *intersected_rd = NULL;
- if (!regdom_changes(rd->alpha2))
- return -EALREADY;
- if (!is_valid_rd(rd)) {
- pr_err("Invalid regulatory domain detected: %c%c\n",
- rd->alpha2[0], rd->alpha2[1]);
- print_regdomain_info(rd);
- return -EINVAL;
- }
- if (!user_request->intersect) {
- reset_regdomains(false, rd);
- return 0;
- }
- intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
- if (!intersected_rd)
- return -EINVAL;
- kfree(rd);
- rd = NULL;
- reset_regdomains(false, intersected_rd);
- return 0;
- }
- static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
- struct regulatory_request *driver_request)
- {
- const struct ieee80211_regdomain *regd;
- const struct ieee80211_regdomain *intersected_rd = NULL;
- const struct ieee80211_regdomain *tmp;
- struct wiphy *request_wiphy;
- if (is_world_regdom(rd->alpha2))
- return -EINVAL;
- if (!regdom_changes(rd->alpha2))
- return -EALREADY;
- if (!is_valid_rd(rd)) {
- pr_err("Invalid regulatory domain detected: %c%c\n",
- rd->alpha2[0], rd->alpha2[1]);
- print_regdomain_info(rd);
- return -EINVAL;
- }
- request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
- if (!request_wiphy)
- return -ENODEV;
- if (!driver_request->intersect) {
- ASSERT_RTNL();
- wiphy_lock(request_wiphy);
- if (request_wiphy->regd) {
- wiphy_unlock(request_wiphy);
- return -EALREADY;
- }
- regd = reg_copy_regd(rd);
- if (IS_ERR(regd)) {
- wiphy_unlock(request_wiphy);
- return PTR_ERR(regd);
- }
- rcu_assign_pointer(request_wiphy->regd, regd);
- wiphy_unlock(request_wiphy);
- reset_regdomains(false, rd);
- return 0;
- }
- intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
- if (!intersected_rd)
- return -EINVAL;
- /*
- * We can trash what CRDA provided now.
- * However if a driver requested this specific regulatory
- * domain we keep it for its private use
- */
- tmp = get_wiphy_regdom(request_wiphy);
- rcu_assign_pointer(request_wiphy->regd, rd);
- rcu_free_regdom(tmp);
- rd = NULL;
- reset_regdomains(false, intersected_rd);
- return 0;
- }
- static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
- struct regulatory_request *country_ie_request)
- {
- struct wiphy *request_wiphy;
- if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
- !is_unknown_alpha2(rd->alpha2))
- return -EINVAL;
- /*
- * Lets only bother proceeding on the same alpha2 if the current
- * rd is non static (it means CRDA was present and was used last)
- * and the pending request came in from a country IE
- */
- if (!is_valid_rd(rd)) {
- pr_err("Invalid regulatory domain detected: %c%c\n",
- rd->alpha2[0], rd->alpha2[1]);
- print_regdomain_info(rd);
- return -EINVAL;
- }
- request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
- if (!request_wiphy)
- return -ENODEV;
- if (country_ie_request->intersect)
- return -EINVAL;
- reset_regdomains(false, rd);
- return 0;
- }
- /*
- * Use this call to set the current regulatory domain. Conflicts with
- * multiple drivers can be ironed out later. Caller must've already
- * kmalloc'd the rd structure.
- */
- int set_regdom(const struct ieee80211_regdomain *rd,
- enum ieee80211_regd_source regd_src)
- {
- struct regulatory_request *lr;
- bool user_reset = false;
- int r;
- if (IS_ERR_OR_NULL(rd))
- return -ENODATA;
- if (!reg_is_valid_request(rd->alpha2)) {
- kfree(rd);
- return -EINVAL;
- }
- if (regd_src == REGD_SOURCE_CRDA)
- reset_crda_timeouts();
- lr = get_last_request();
- /* Note that this doesn't update the wiphys, this is done below */
- switch (lr->initiator) {
- case NL80211_REGDOM_SET_BY_CORE:
- r = reg_set_rd_core(rd);
- break;
- case NL80211_REGDOM_SET_BY_USER:
- cfg80211_save_user_regdom(rd);
- r = reg_set_rd_user(rd, lr);
- user_reset = true;
- break;
- case NL80211_REGDOM_SET_BY_DRIVER:
- r = reg_set_rd_driver(rd, lr);
- break;
- case NL80211_REGDOM_SET_BY_COUNTRY_IE:
- r = reg_set_rd_country_ie(rd, lr);
- break;
- default:
- WARN(1, "invalid initiator %d\n", lr->initiator);
- kfree(rd);
- return -EINVAL;
- }
- if (r) {
- switch (r) {
- case -EALREADY:
- reg_set_request_processed();
- break;
- default:
- /* Back to world regulatory in case of errors */
- restore_regulatory_settings(user_reset, false);
- }
- kfree(rd);
- return r;
- }
- /* This would make this whole thing pointless */
- if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
- return -EINVAL;
- /* update all wiphys now with the new established regulatory domain */
- update_all_wiphy_regulatory(lr->initiator);
- print_regdomain(get_cfg80211_regdom());
- nl80211_send_reg_change_event(lr);
- reg_set_request_processed();
- return 0;
- }
- static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
- struct ieee80211_regdomain *rd)
- {
- const struct ieee80211_regdomain *regd;
- const struct ieee80211_regdomain *prev_regd;
- struct cfg80211_registered_device *rdev;
- if (WARN_ON(!wiphy || !rd))
- return -EINVAL;
- if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
- "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
- return -EPERM;
- if (WARN(!is_valid_rd(rd),
- "Invalid regulatory domain detected: %c%c\n",
- rd->alpha2[0], rd->alpha2[1])) {
- print_regdomain_info(rd);
- return -EINVAL;
- }
- regd = reg_copy_regd(rd);
- if (IS_ERR(regd))
- return PTR_ERR(regd);
- rdev = wiphy_to_rdev(wiphy);
- spin_lock(®_requests_lock);
- prev_regd = rdev->requested_regd;
- rdev->requested_regd = regd;
- spin_unlock(®_requests_lock);
- kfree(prev_regd);
- return 0;
- }
- int regulatory_set_wiphy_regd(struct wiphy *wiphy,
- struct ieee80211_regdomain *rd)
- {
- int ret = __regulatory_set_wiphy_regd(wiphy, rd);
- if (ret)
- return ret;
- schedule_work(®_work);
- return 0;
- }
- EXPORT_SYMBOL(regulatory_set_wiphy_regd);
- int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
- struct ieee80211_regdomain *rd)
- {
- int ret;
- ASSERT_RTNL();
- ret = __regulatory_set_wiphy_regd(wiphy, rd);
- if (ret)
- return ret;
- /* process the request immediately */
- reg_process_self_managed_hint(wiphy);
- reg_check_channels();
- return 0;
- }
- EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync);
- void wiphy_regulatory_register(struct wiphy *wiphy)
- {
- struct regulatory_request *lr = get_last_request();
- /* self-managed devices ignore beacon hints and country IE */
- if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
- wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
- REGULATORY_COUNTRY_IE_IGNORE;
- /*
- * The last request may have been received before this
- * registration call. Call the driver notifier if
- * initiator is USER.
- */
- if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
- reg_call_notifier(wiphy, lr);
- }
- if (!reg_dev_ignore_cell_hint(wiphy))
- reg_num_devs_support_basehint++;
- wiphy_update_regulatory(wiphy, lr->initiator);
- wiphy_all_share_dfs_chan_state(wiphy);
- reg_process_self_managed_hints();
- }
- void wiphy_regulatory_deregister(struct wiphy *wiphy)
- {
- struct wiphy *request_wiphy = NULL;
- struct regulatory_request *lr;
- lr = get_last_request();
- if (!reg_dev_ignore_cell_hint(wiphy))
- reg_num_devs_support_basehint--;
- rcu_free_regdom(get_wiphy_regdom(wiphy));
- RCU_INIT_POINTER(wiphy->regd, NULL);
- if (lr)
- request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
- if (!request_wiphy || request_wiphy != wiphy)
- return;
- lr->wiphy_idx = WIPHY_IDX_INVALID;
- lr->country_ie_env = ENVIRON_ANY;
- }
- /*
- * See FCC notices for UNII band definitions
- * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
- * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
- */
- int cfg80211_get_unii(int freq)
- {
- /* UNII-1 */
- if (freq >= 5150 && freq <= 5250)
- return 0;
- /* UNII-2A */
- if (freq > 5250 && freq <= 5350)
- return 1;
- /* UNII-2B */
- if (freq > 5350 && freq <= 5470)
- return 2;
- /* UNII-2C */
- if (freq > 5470 && freq <= 5725)
- return 3;
- /* UNII-3 */
- if (freq > 5725 && freq <= 5825)
- return 4;
- /* UNII-5 */
- if (freq > 5925 && freq <= 6425)
- return 5;
- /* UNII-6 */
- if (freq > 6425 && freq <= 6525)
- return 6;
- /* UNII-7 */
- if (freq > 6525 && freq <= 6875)
- return 7;
- /* UNII-8 */
- if (freq > 6875 && freq <= 7125)
- return 8;
- return -EINVAL;
- }
- bool regulatory_indoor_allowed(void)
- {
- return reg_is_indoor;
- }
- bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
- {
- const struct ieee80211_regdomain *regd = NULL;
- const struct ieee80211_regdomain *wiphy_regd = NULL;
- bool pre_cac_allowed = false;
- rcu_read_lock();
- regd = rcu_dereference(cfg80211_regdomain);
- wiphy_regd = rcu_dereference(wiphy->regd);
- if (!wiphy_regd) {
- if (regd->dfs_region == NL80211_DFS_ETSI)
- pre_cac_allowed = true;
- rcu_read_unlock();
- return pre_cac_allowed;
- }
- if (regd->dfs_region == wiphy_regd->dfs_region &&
- wiphy_regd->dfs_region == NL80211_DFS_ETSI)
- pre_cac_allowed = true;
- rcu_read_unlock();
- return pre_cac_allowed;
- }
- EXPORT_SYMBOL(regulatory_pre_cac_allowed);
- static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
- {
- struct wireless_dev *wdev;
- /* If we finished CAC or received radar, we should end any
- * CAC running on the same channels.
- * the check !cfg80211_chandef_dfs_usable contain 2 options:
- * either all channels are available - those the CAC_FINISHED
- * event has effected another wdev state, or there is a channel
- * in unavailable state in wdev chandef - those the RADAR_DETECTED
- * event has effected another wdev state.
- * In both cases we should end the CAC on the wdev.
- */
- list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
- struct cfg80211_chan_def *chandef;
- if (!wdev->cac_started)
- continue;
- /* FIXME: radar detection is tied to link 0 for now */
- chandef = wdev_chandef(wdev, 0);
- if (!chandef)
- continue;
- if (!cfg80211_chandef_dfs_usable(&rdev->wiphy, chandef))
- rdev_end_cac(rdev, wdev->netdev);
- }
- }
- void regulatory_propagate_dfs_state(struct wiphy *wiphy,
- struct cfg80211_chan_def *chandef,
- enum nl80211_dfs_state dfs_state,
- enum nl80211_radar_event event)
- {
- struct cfg80211_registered_device *rdev;
- ASSERT_RTNL();
- if (WARN_ON(!cfg80211_chandef_valid(chandef)))
- return;
- list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
- if (wiphy == &rdev->wiphy)
- continue;
- if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
- continue;
- if (!ieee80211_get_channel(&rdev->wiphy,
- chandef->chan->center_freq))
- continue;
- cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
- if (event == NL80211_RADAR_DETECTED ||
- event == NL80211_RADAR_CAC_FINISHED) {
- cfg80211_sched_dfs_chan_update(rdev);
- cfg80211_check_and_end_cac(rdev);
- }
- nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
- }
- }
- static int __init regulatory_init_db(void)
- {
- int err;
- /*
- * It's possible that - due to other bugs/issues - cfg80211
- * never called regulatory_init() below, or that it failed;
- * in that case, don't try to do any further work here as
- * it's doomed to lead to crashes.
- */
- if (IS_ERR_OR_NULL(reg_pdev))
- return -EINVAL;
- err = load_builtin_regdb_keys();
- if (err) {
- platform_device_unregister(reg_pdev);
- return err;
- }
- /* We always try to get an update for the static regdomain */
- err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
- if (err) {
- if (err == -ENOMEM) {
- platform_device_unregister(reg_pdev);
- return err;
- }
- /*
- * N.B. kobject_uevent_env() can fail mainly for when we're out
- * memory which is handled and propagated appropriately above
- * but it can also fail during a netlink_broadcast() or during
- * early boot for call_usermodehelper(). For now treat these
- * errors as non-fatal.
- */
- pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
- }
- /*
- * Finally, if the user set the module parameter treat it
- * as a user hint.
- */
- if (!is_world_regdom(ieee80211_regdom))
- regulatory_hint_user(ieee80211_regdom,
- NL80211_USER_REG_HINT_USER);
- return 0;
- }
- #ifndef MODULE
- late_initcall(regulatory_init_db);
- #endif
- int __init regulatory_init(void)
- {
- reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
- if (IS_ERR(reg_pdev))
- return PTR_ERR(reg_pdev);
- rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
- user_alpha2[0] = '9';
- user_alpha2[1] = '7';
- #ifdef MODULE
- return regulatory_init_db();
- #else
- return 0;
- #endif
- }
- void regulatory_exit(void)
- {
- struct regulatory_request *reg_request, *tmp;
- struct reg_beacon *reg_beacon, *btmp;
- cancel_work_sync(®_work);
- cancel_crda_timeout_sync();
- cancel_delayed_work_sync(®_check_chans);
- /* Lock to suppress warnings */
- rtnl_lock();
- reset_regdomains(true, NULL);
- rtnl_unlock();
- dev_set_uevent_suppress(®_pdev->dev, true);
- platform_device_unregister(reg_pdev);
- list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
- list_del(®_beacon->list);
- kfree(reg_beacon);
- }
- list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
- list_del(®_beacon->list);
- kfree(reg_beacon);
- }
- list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
- list_del(®_request->list);
- kfree(reg_request);
- }
- if (!IS_ERR_OR_NULL(regdb))
- kfree(regdb);
- if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
- kfree(cfg80211_user_regdom);
- free_regdb_keyring();
- }
|