2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
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5 * modification, are permitted provided that the following conditions
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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31 * $DragonFly: src/sys/net/ifq_var.h,v 1.7 2006/05/20 02:42:08 dillon Exp $
34 * NOTE ON MPSAFE access. Routines which manipulate the packet queue must
35 * be called within a critical section to interlock subsystems based on
36 * the MP lock, and must be holding the interface serializer to interlock
37 * MPSAFE subsystems. Once all subsystems are made MPSAFE, the critical
38 * section will no longer be required.
41 #ifndef _NET_IFQ_VAR_H_
42 #define _NET_IFQ_VAR_H_
44 #if defined(_KERNEL) && !defined(_SYS_SYSTM_H_)
45 #include <sys/systm.h>
47 #ifndef _SYS_THREAD2_H_
48 #include <sys/thread2.h>
50 #ifndef _SYS_SERIALIZE_H_
51 #include <sys/serialize.h>
56 #ifndef _NET_IF_VAR_H_
57 #include <net/if_var.h>
59 #ifndef _NET_ALTQ_IF_ALTQ_H_
60 #include <net/altq/if_altq.h>
67 ifq_is_enabled(struct ifaltq *_ifq)
69 return(_ifq->altq_flags & ALTQF_ENABLED);
73 ifq_is_attached(struct ifaltq *_ifq)
75 return(_ifq->altq_disc != NULL);
79 ifq_is_enabled(struct ifaltq *_ifq)
85 ifq_is_attached(struct ifaltq *_ifq)
92 * WARNING: Should only be called in an MPSAFE manner.
95 ifq_is_ready(struct ifaltq *_ifq)
97 return(_ifq->altq_flags & ALTQF_READY);
101 * WARNING: Should only be called in an MPSAFE manner.
104 ifq_set_ready(struct ifaltq *_ifq)
106 _ifq->altq_flags |= ALTQF_READY;
110 * WARNING: Should only be called in an MPSAFE manner.
113 ifq_enqueue(struct ifaltq *_ifq, struct mbuf *_m, struct altq_pktattr *_pa)
115 return((*_ifq->altq_enqueue)(_ifq, _m, _pa));
119 * WARNING: Should only be called in an MPSAFE manner.
121 static __inline struct mbuf *
122 ifq_dequeue(struct ifaltq *_ifq, struct mbuf *_mpolled)
125 if (_ifq->altq_tbr != NULL)
126 return(tbr_dequeue(_ifq, _mpolled, ALTDQ_REMOVE));
128 return((*_ifq->altq_dequeue)(_ifq, _mpolled, ALTDQ_REMOVE));
132 * WARNING: Should only be called in an MPSAFE manner.
134 static __inline struct mbuf *
135 ifq_poll(struct ifaltq *_ifq)
138 if (_ifq->altq_tbr != NULL)
139 return(tbr_dequeue(_ifq, NULL, ALTDQ_POLL));
141 return((*_ifq->altq_dequeue)(_ifq, NULL, ALTDQ_POLL));
145 * WARNING: Should only be called in an MPSAFE manner.
148 ifq_purge(struct ifaltq *_ifq)
150 (*_ifq->altq_request)(_ifq, ALTRQ_PURGE, NULL);
154 * WARNING: Should only be called in an MPSAFE manner.
157 ifq_classify(struct ifaltq *_ifq, struct mbuf *_m, uint8_t _af,
158 struct altq_pktattr *_pa)
160 if (!ifq_is_enabled(_ifq))
163 _pa->pattr_hdr = mtod(_m, caddr_t);
164 if (_ifq->altq_flags & ALTQF_CLASSIFY)
165 (*_ifq->altq_classify)(_ifq, _m, _pa);
169 * Hand a packet to an interface.
171 * For subsystems protected by the MP lock, access to the queue is protected
172 * by a critical section.
174 * For MPSAFE subsystems and drivers, access to the queue is protected by
175 * the ifnet serializer.
178 ifq_handoff(struct ifnet *_ifp, struct mbuf *_m, struct altq_pktattr *_pa)
182 ASSERT_SERIALIZED(_ifp->if_serializer);
183 _error = ifq_enqueue(&_ifp->if_snd, _m, _pa);
185 _ifp->if_obytes += _m->m_pkthdr.len;
186 if (_m->m_flags & M_MCAST)
188 if ((_ifp->if_flags & IFF_OACTIVE) == 0)
189 (*_ifp->if_start)(_ifp);
195 ifq_is_empty(struct ifaltq *_ifq)
197 return(_ifq->ifq_len == 0);
201 ifq_set_maxlen(struct ifaltq *_ifq, int _len)
203 _ifq->ifq_maxlen = _len;
206 void ifq_set_classic(struct ifaltq *);