Date: Sat, 6 Sep 2008 00:19:57 GMT From: Sam Leffler <sam@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 149297 for review Message-ID: <200809060019.m860JvI4006857@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=149297 Change 149297 by sam@sam_ebb on 2008/09/06 00:18:59 Rewrite power save support; we support two packet lists, one for frames coming out of the 802.11 layer and one for frames coming up from the driver (already encapsulated with an 802.11 header and marked M_ENCAP). Frames are returned either to the vap snd q or the device snd q based on which q they come from. Drivers must handle encap'd frames if they submit them (otherwise drivers don't need to worry as they will never get encap'd frames). Lightly tested; in particular need to review the age calcs when frames are on both lists. Affected files ... .. //depot/projects/vap/sys/net80211/ieee80211_freebsd.h#35 edit .. //depot/projects/vap/sys/net80211/ieee80211_hostap.c#25 edit .. //depot/projects/vap/sys/net80211/ieee80211_node.c#45 edit .. //depot/projects/vap/sys/net80211/ieee80211_node.h#26 edit .. //depot/projects/vap/sys/net80211/ieee80211_output.c#56 edit .. //depot/projects/vap/sys/net80211/ieee80211_power.c#13 edit .. //depot/projects/vap/sys/net80211/ieee80211_power.h#8 edit .. //depot/projects/vap/sys/net80211/ieee80211_var.h#51 edit Differences ... ==== //depot/projects/vap/sys/net80211/ieee80211_freebsd.h#35 (text+ko) ==== @@ -112,41 +112,14 @@ } while (0) /* - * Per-node power-save queue definitions. + * Power-save queue definitions. */ -#define IEEE80211_NODE_SAVEQ_INIT(_ni, _name) do { \ - mtx_init(&(_ni)->ni_savedq.ifq_mtx, _name, "802.11 ps queue", MTX_DEF);\ - (_ni)->ni_savedq.ifq_maxlen = IEEE80211_PS_MAX_QUEUE; \ -} while (0) -#define IEEE80211_NODE_SAVEQ_DESTROY(_ni) \ - mtx_destroy(&(_ni)->ni_savedq.ifq_mtx) -#define IEEE80211_NODE_SAVEQ_QLEN(_ni) \ - _IF_QLEN(&(_ni)->ni_savedq) -#define IEEE80211_NODE_SAVEQ_LOCK(_ni) do { \ - IF_LOCK(&(_ni)->ni_savedq); \ -} while (0) -#define IEEE80211_NODE_SAVEQ_UNLOCK(_ni) do { \ - IF_UNLOCK(&(_ni)->ni_savedq); \ -} while (0) -#define IEEE80211_NODE_SAVEQ_DEQUEUE(_ni, _m, _qlen) do { \ - IEEE80211_NODE_SAVEQ_LOCK(_ni); \ - _IF_DEQUEUE(&(_ni)->ni_savedq, _m); \ - (_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \ - IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \ -} while (0) -#define IEEE80211_NODE_SAVEQ_DRAIN(_ni, _qlen) do { \ - IEEE80211_NODE_SAVEQ_LOCK(_ni); \ - (_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \ - _IF_DRAIN(&(_ni)->ni_savedq); \ - IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \ -} while (0) -/* XXX could be optimized */ -#define _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(_ni, _m) do { \ - _IF_DEQUEUE(&(_ni)->ni_savedq, m); \ -} while (0) -#define _IEEE80211_NODE_SAVEQ_ENQUEUE(_ni, _m, _qlen, _age) do {\ - _AGEQ_ENQUEUE(&ni->ni_savedq, _m, _qlen, _age); \ -} while (0) +typedef struct mtx ieee80211_psq_lock_t; +#define IEEE80211_PSQ_INIT(_psq, _name) \ + mtx_init(&(_psq)->psq_lock, _name, "802.11 ps q", MTX_DEF); +#define IEEE80211_PSQ_DESTROY(_psq) mtx_destroy(&(_psq)->psq_lock) +#define IEEE80211_PSQ_LOCK(_psq) mtx_lock(&(_psq)->psq_lock) +#define IEEE80211_PSQ_UNLOCK(_psq) mtx_unlock(&(_psq)->psq_lock) #ifndef IF_PREPEND_LIST #define _IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do { \ ==== //depot/projects/vap/sys/net80211/ieee80211_hostap.c#25 (text+ko) ==== @@ -2171,7 +2171,7 @@ { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_frame_min *wh; - struct ifnet *ifp = vap->iv_ifp; + struct ifnet *ifp; struct mbuf *m; uint16_t aid; int qlen; @@ -2208,7 +2208,7 @@ } /* Okay, take the first queued packet and put it out... */ - IEEE80211_NODE_SAVEQ_DEQUEUE(ni, m, qlen); + m = ieee80211_node_psq_dequeue(ni, &qlen); if (m == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, "%s", "recv ps-poll, but queue empty"); @@ -2234,6 +2234,11 @@ vap->iv_set_tim(ni, 0); } m->m_flags |= M_PWR_SAV; /* bypass PS handling */ + + if (m->m_flags & M_ENCAP) + ifp = vap->iv_ic->ic_ifp; + else + ifp = vap->iv_ifp; IF_ENQUEUE(&ifp->if_snd, m); if_start(ifp); } ==== //depot/projects/vap/sys/net80211/ieee80211_node.c#45 (text+ko) ==== @@ -885,7 +885,7 @@ /* * Drain power save queue and, if needed, clear TIM. */ - if (ieee80211_node_saveq_drain(ni) != 0 && vap->iv_set_tim != NULL) + if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); ni->ni_associd = 0; @@ -924,7 +924,7 @@ ic->ic_node_cleanup(ni); ieee80211_ies_cleanup(&ni->ni_ies); - IEEE80211_NODE_SAVEQ_DESTROY(ni); + ieee80211_psq_cleanup(&ni->ni_psq); IEEE80211_NODE_WDSQ_DESTROY(ni); FREE(ni, M_80211_NODE); } @@ -939,9 +939,8 @@ /* * Age frames on the power save queue. */ - if (ieee80211_node_saveq_age(ni) != 0 && - IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && - vap->iv_set_tim != NULL) + if (ieee80211_node_psq_age(ni) != 0 && + ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); /* * Age frames on the wds pending queue. @@ -1012,7 +1011,7 @@ ni->ni_inact_reload = nt->nt_inact_init; ni->ni_inact = ni->ni_inact_reload; ni->ni_ath_defkeyix = 0x7fff; - IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); + ieee80211_psq_init(&ni->ni_psq, "unknown"); IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); IEEE80211_NODE_LOCK(nt); @@ -1059,7 +1058,7 @@ IEEE80211_KEYIX_NONE); ni->ni_txpower = bss->ni_txpower; /* XXX optimize away */ - IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); + ieee80211_psq_init(&ni->ni_psq, "unknown"); IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); } else { /* XXX msg */ ==== //depot/projects/vap/sys/net80211/ieee80211_node.h#26 (text+ko) ==== @@ -183,7 +183,7 @@ short ni_inact; /* inactivity mark count */ short ni_inact_reload;/* inactivity reload value */ int ni_txrate; /* legacy rate/MCS */ - struct ifqueue ni_savedq; /* ps-poll queue */ + struct ieee80211_psq ni_psq; /* power save queue */ struct ieee80211_nodestats ni_stats; /* per-node statistics */ struct ieee80211vap *ni_wdsvap; /* associated WDS vap */ ==== //depot/projects/vap/sys/net80211/ieee80211_output.c#56 (text+ko) ==== @@ -230,7 +230,7 @@ * the frame back when the time is right. * XXX lose WDS vap linkage? */ - ieee80211_pwrsave(ni, m); + (void) ieee80211_pwrsave(ni, m); ieee80211_free_node(ni); continue; } ==== //depot/projects/vap/sys/net80211/ieee80211_power.c#13 (text+ko) ==== @@ -99,24 +99,115 @@ } } +void +ieee80211_psq_init(struct ieee80211_psq *psq, const char *name) +{ + memset(psq, 0, sizeof(psq)); + psq->psq_maxlen = IEEE80211_PS_MAX_QUEUE; + IEEE80211_PSQ_INIT(psq, name); /* OS-dependent setup */ +} + +void +ieee80211_psq_cleanup(struct ieee80211_psq *psq) +{ +#if 0 + psq_drain(psq); /* XXX should not be needed? */ +#else + KASSERT(psq->psq_len == 0, ("%d frames on ps q", psq->psq_len)); +#endif + IEEE80211_PSQ_DESTROY(psq); /* OS-dependent cleanup */ +} + +/* + * Return the highest priority frame in the ps queue. + */ +struct mbuf * +ieee80211_node_psq_dequeue(struct ieee80211_node *ni, int *qlen) +{ + struct ieee80211_psq *psq = &ni->ni_psq; + struct ieee80211_psq_head *qhead; + struct mbuf *m; + + IEEE80211_PSQ_LOCK(psq); + qhead = &psq->psq_head[0]; +again: + if ((m = qhead->head) != NULL) { + if ((qhead->head = m->m_nextpkt) == NULL) + qhead->tail = NULL; + KASSERT(qhead->len > 0, ("qhead len %d", qhead->len)); + qhead->len--; + KASSERT(psq->psq_len > 0, ("psq len %d", psq->psq_len)); + psq->psq_len--; + m->m_nextpkt = NULL; + } + if (m == NULL && qhead == &psq->psq_head[0]) { + /* Algol-68 style for loop */ + qhead = &psq->psq_head[1]; + goto again; + } + if (qlen != NULL) + *qlen = psq->psq_len; + IEEE80211_PSQ_UNLOCK(psq); + return m; +} + +/* + * Reclaim an mbuf from the ps q. If marked with M_ENCAP + * we assume there is a node reference that must be relcaimed. + */ +static void +psq_mfree(struct mbuf *m) +{ + if (m->m_flags & M_ENCAP) { + struct ieee80211_node *ni = (void *) m->m_pkthdr.rcvif; + ieee80211_free_node(ni); + } + m->m_nextpkt = NULL; + m_freem(m); +} + /* - * Clear any frames queued on a node's power save queue. + * Clear any frames queued in the power save queue. * The number of frames that were present is returned. */ -int -ieee80211_node_saveq_drain(struct ieee80211_node *ni) +static int +psq_drain(struct ieee80211_psq *psq) { + struct ieee80211_psq_head *qhead; + struct mbuf *m; int qlen; - IEEE80211_NODE_SAVEQ_LOCK(ni); - qlen = IEEE80211_NODE_SAVEQ_QLEN(ni); - _IF_DRAIN(&ni->ni_savedq); - IEEE80211_NODE_SAVEQ_UNLOCK(ni); + IEEE80211_PSQ_LOCK(psq); + qlen = psq->psq_len; + qhead = &psq->psq_head[0]; +again: + while ((m = qhead->head) != NULL) { + qhead->head = m->m_nextpkt; + psq_mfree(m); + } + qhead->tail = NULL; + qhead->len = 0; + if (qhead == &psq->psq_head[0]) { /* Algol-68 style for loop */ + qhead = &psq->psq_head[1]; + goto again; + } + psq->psq_len = 0; + IEEE80211_PSQ_UNLOCK(psq); return qlen; } /* + * Clear any frames queued in the power save queue. + * The number of frames that were present is returned. + */ +int +ieee80211_node_psq_drain(struct ieee80211_node *ni) +{ + return psq_drain(&ni->ni_psq); +} + +/* * Age frames on the power save queue. The aging interval is * 4 times the listen interval specified by the station. This * number is factored into the age calculations when the frame @@ -127,28 +218,41 @@ * can check if it needs to adjust the tim. */ int -ieee80211_node_saveq_age(struct ieee80211_node *ni) +ieee80211_node_psq_age(struct ieee80211_node *ni) { + struct ieee80211_psq *psq = &ni->ni_psq; int discard = 0; - if (IEEE80211_NODE_SAVEQ_QLEN(ni) != 0) { + if (psq->psq_len != 0) { #ifdef IEEE80211_DEBUG struct ieee80211vap *vap = ni->ni_vap; #endif + struct ieee80211_psq_head *qhead; struct mbuf *m; - IEEE80211_NODE_SAVEQ_LOCK(ni); - while (IF_POLL(&ni->ni_savedq, m) != NULL && - M_AGE_GET(m) < IEEE80211_INACT_WAIT) { + IEEE80211_PSQ_LOCK(psq); + qhead = &psq->psq_head[0]; + again: + while ((m = qhead->head) != NULL && + M_AGE_GET(m) < IEEE80211_INACT_WAIT) { IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "discard frame, age %u", M_AGE_GET(m)); - _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); - m_freem(m); + if ((qhead->head = m->m_nextpkt) == NULL) + qhead->tail = NULL; + KASSERT(qhead->len > 0, ("qhead len %d", qhead->len)); + qhead->len--; + KASSERT(psq->psq_len > 0, ("psq len %d", psq->psq_len)); + psq->psq_len--; + psq_mfree(m); discard++; } + if (qhead == &psq->psq_head[0]) { /* Algol-68 style for loop */ + qhead = &psq->psq_head[1]; + goto again; + } if (m != NULL) M_AGE_SUB(m, IEEE80211_INACT_WAIT); - IEEE80211_NODE_SAVEQ_UNLOCK(ni); + IEEE80211_PSQ_UNLOCK(psq); IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "discard %u frames for age", discard); @@ -211,82 +315,143 @@ * The new packet is placed on the node's saved queue, and the TIM * is changed, if necessary. */ -void +int ieee80211_pwrsave(struct ieee80211_node *ni, struct mbuf *m) { + struct ieee80211_psq *psq = &ni->ni_psq; struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; + struct ieee80211_psq_head *qhead; int qlen, age; - IEEE80211_NODE_SAVEQ_LOCK(ni); - if (_IF_QFULL(&ni->ni_savedq)) { - _IF_DROP(&ni->ni_savedq); - IEEE80211_NODE_SAVEQ_UNLOCK(ni); + IEEE80211_PSQ_LOCK(psq); + if (psq->psq_len >= psq->psq_maxlen) { + psq->psq_drops++; + IEEE80211_PSQ_UNLOCK(psq); IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, "pwr save q overflow, drops %d (size %d)", - ni->ni_savedq.ifq_drops, IEEE80211_PS_MAX_QUEUE); + psq->psq_drops, psq->psq_len); #ifdef IEEE80211_DEBUG if (ieee80211_msg_dumppkts(vap)) ieee80211_dump_pkt(ni->ni_ic, mtod(m, caddr_t), m->m_len, -1, -1); #endif - m_freem(m); - return; + psq_mfree(m); + return ENOSPC; } /* - * Tag the frame with it's expiry time and insert - * it in the queue. The aging interval is 4 times - * the listen interval specified by the station. - * Frames that sit around too long are reclaimed - * using this information. + * Tag the frame with it's expiry time and insert it in + * the appropriate queue. The aging interval is 4 times + * the listen interval specified by the station. Frames + * that sit around too long are reclaimed using this + * information. */ /* TU -> secs. XXX handle overflow? */ age = IEEE80211_TU_TO_MS((ni->ni_intval * ic->ic_bintval) << 2) / 1000; - _IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age); - IEEE80211_NODE_SAVEQ_UNLOCK(ni); + /* + * Encapsulated frames go on the high priority queue, + * other stuff goes on the low priority queue. We use + * this to order frames returned out of the driver + * ahead of frames we collect in ieee80211_start. + */ + if (m->m_flags & M_ENCAP) + qhead = &psq->psq_head[0]; + else + qhead = &psq->psq_head[1]; + if (qhead->tail == NULL) { + struct mbuf *mh; + + qhead->head = m; + /* + * Take care to adjust age when inserting the first + * frame of a queue and the other queue already has + * frames. We need to preserve the age difference + * relationship so ieee80211_node_psq_age works. + */ + if (qhead == &psq->psq_head[1]) { + mh = psq->psq_head[0].head; + if (mh != NULL) + age-= M_AGE_GET(mh); + } else { + mh = psq->psq_head[1].head; + if (mh != NULL) { + int nage = M_AGE_GET(mh) - age; + /* XXX is clamping to zero good 'nuf? */ + M_AGE_SET(mh, nage < 0 ? 0 : nage); + } + } + } else { + qhead->tail->m_nextpkt = m; + age -= M_AGE_GET(qhead->head); + } + KASSERT(age >= 0, ("age %d", age)); + M_AGE_SET(m, age); + m->m_nextpkt = NULL; + qhead->tail = m; + qhead->len++; + qlen = ++(psq->psq_len); + IEEE80211_PSQ_UNLOCK(psq); IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "save frame with age %d, %u now queued", age, qlen); if (qlen == 1 && vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 1); + + return 0; } /* - * Unload the frames from the ps q but don't send them - * to the driver yet. We do this in two stages to minimize - * locking but also because there's no easy way to preserve - * ordering given the existing ifnet access mechanisms. - * XXX could be optimized + * Move frames from the ps q to the vap's send queue + * and/or the driver's send queue; and kick the start + * method for each, as appropriate. Note we're careful + * to preserve packet ordering here. */ static void pwrsave_flushq(struct ieee80211_node *ni) { - struct mbuf *m, *mhead, *mtail; - int mcount; + struct ieee80211_psq *psq = &ni->ni_psq; + struct ieee80211vap *vap = ni->ni_vap; + struct ieee80211_psq_head *qhead; + struct ifnet *parent, *ifp; + + IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, + "flush ps queue, %u packets queued", psq->psq_len); + + IEEE80211_PSQ_LOCK(psq); + qhead = &psq->psq_head[0]; /* 802.11 frames */ + if (qhead->head != NULL) { + /* XXX could dispatch through vap and check M_ENCAP */ + parent = vap->iv_ic->ic_ifp; + /* XXX need different driver interface */ + /* XXX bypasses q max and OACTIVE */ + IF_PREPEND_LIST(&parent->if_snd, qhead->head, qhead->tail, + qhead->len); + qhead->head = qhead->tail = NULL; + qhead->len = 0; + } else + parent = NULL; - IEEE80211_NODE_SAVEQ_LOCK(ni); - mcount = IEEE80211_NODE_SAVEQ_QLEN(ni); - mhead = mtail = NULL; - for (;;) { - _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(ni, m); - if (m == NULL) - break; - if (mhead == NULL) { - mhead = m; - m->m_nextpkt = NULL; - } else - mtail->m_nextpkt = m; - mtail = m; - } - IEEE80211_NODE_SAVEQ_UNLOCK(ni); - if (mhead != NULL) { + qhead = &psq->psq_head[1]; /* 802.3 frames */ + if (qhead->head != NULL) { + ifp = vap->iv_ifp; /* XXX need different driver interface */ /* XXX bypasses q max and OACTIVE */ - struct ifnet *ifp = ni->ni_vap->iv_ifp; - IF_PREPEND_LIST(&ifp->if_snd, mhead, mtail, mcount); + IF_PREPEND_LIST(&ifp->if_snd, qhead->head, qhead->tail, + qhead->len); + qhead->head = qhead->tail = NULL; + qhead->len = 0; + } else + ifp = NULL; + psq->psq_len = 0; + IEEE80211_PSQ_UNLOCK(psq); + + /* NB: do this outside the psq lock */ + /* XXX packets might get reordered if parent is OACTIVE */ + if (parent != NULL) + if_start(parent); + if (ifp != NULL) if_start(ifp); - } } /* @@ -326,7 +491,8 @@ /* NB if no sta's in ps, driver should flush mc q */ vap->iv_update_ps(vap, vap->iv_ps_sta); } - pwrsave_flushq(ni); + if (ni->ni_psq.psq_len != 0) + pwrsave_flushq(ni); } } @@ -337,7 +503,6 @@ ieee80211_sta_pwrsave(struct ieee80211vap *vap, int enable) { struct ieee80211_node *ni = vap->iv_bss; - int qlen; if (!((enable != 0) ^ ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) != 0))) return; @@ -353,12 +518,8 @@ * data frame we send the ap. * XXX can we use a data frame to take us out of ps? */ - qlen = IEEE80211_NODE_SAVEQ_QLEN(ni); - if (qlen != 0) { - IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, - "flush ps queue, %u packets queued", qlen); + if (ni->ni_psq.psq_len != 0) pwrsave_flushq(ni); - } } else { ni->ni_flags |= IEEE80211_NODE_PWR_MGT; ieee80211_send_nulldata(ieee80211_ref_node(ni)); ==== //depot/projects/vap/sys/net80211/ieee80211_power.h#8 (text+ko) ==== @@ -28,16 +28,50 @@ #define _NET80211_IEEE80211_POWER_H_ struct ieee80211com; +struct ieee80211vap; +struct ieee80211_node; +struct mbuf; + +/* + * Power save packet queues. There are two queues, one + * for frames coming from the net80211 layer and the other + * for frames that come from the driver. Frames from the + * driver are expected to have M_ENCAP marked to indicate + * they have already been encapsulated and are treated as + * higher priority: they are sent first when flushing the + * queue on a power save state change or in response to a + * ps-poll frame. + * + * Note that frames sent from the high priority queue are + * fed directly to the driver without going through + * ieee80211_start again; drivers that send up encap'd + * frames are required to handle them when they come back. + */ +struct ieee80211_psq { + ieee80211_psq_lock_t psq_lock; + int psq_len; + int psq_maxlen; + int psq_drops; + struct ieee80211_psq_head { + struct mbuf *head; + struct mbuf *tail; + int len; + } psq_head[2]; /* 2 priorities */ +}; +void ieee80211_psq_init(struct ieee80211_psq *, const char *); +void ieee80211_psq_cleanup(struct ieee80211_psq *); + void ieee80211_power_attach(struct ieee80211com *); void ieee80211_power_detach(struct ieee80211com *); void ieee80211_power_vattach(struct ieee80211vap *); void ieee80211_power_vdetach(struct ieee80211vap *); void ieee80211_power_latevattach(struct ieee80211vap *); -int ieee80211_node_saveq_drain(struct ieee80211_node *); -int ieee80211_node_saveq_age(struct ieee80211_node *); -void ieee80211_pwrsave(struct ieee80211_node *, struct mbuf *); +struct mbuf *ieee80211_node_psq_dequeue(struct ieee80211_node *ni, int *qlen); +int ieee80211_node_psq_drain(struct ieee80211_node *); +int ieee80211_node_psq_age(struct ieee80211_node *); +int ieee80211_pwrsave(struct ieee80211_node *, struct mbuf *); void ieee80211_node_pwrsave(struct ieee80211_node *, int enable); void ieee80211_sta_pwrsave(struct ieee80211vap *, int enable); ==== //depot/projects/vap/sys/net80211/ieee80211_var.h#51 (text+ko) ==== @@ -47,8 +47,8 @@ #include <net80211/ieee80211_crypto.h> #include <net80211/ieee80211_dfs.h> #include <net80211/ieee80211_ioctl.h> /* for ieee80211_stats */ +#include <net80211/ieee80211_power.h> #include <net80211/ieee80211_node.h> -#include <net80211/ieee80211_power.h> #include <net80211/ieee80211_proto.h> #include <net80211/ieee80211_scan.h>
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