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26 * $KAME: if_altq.h,v 1.12 2005/04/13 03:44:25 suz Exp $
29 #ifndef _ALTQ_IF_ALTQ_H_
30 #define _ALTQ_IF_ALTQ_H_
32 #include <sys/lock.h> /* XXX */
33 #include <sys/mutex.h> /* XXX */
34 #include <sys/event.h> /* XXX */
36 struct altq_pktattr; struct tb_regulator; struct top_cdnr;
39 * Structure defining a queue for a network interface.
42 /* fields compatible with struct ifqueue */
43 struct mbuf *ifq_head;
44 struct mbuf *ifq_tail;
49 /* driver owned queue (used for bulk dequeue and prepend) UNLOCKED */
50 struct mbuf *ifq_drv_head;
51 struct mbuf *ifq_drv_tail;
55 /* alternate queueing related fields */
56 int altq_type; /* discipline type */
57 int altq_flags; /* flags (e.g. ready, in-use) */
58 void *altq_disc; /* for discipline-specific use */
59 struct ifnet *altq_ifp; /* back pointer to interface */
61 int (*altq_enqueue)(struct ifaltq *, struct mbuf *,
62 struct altq_pktattr *);
63 struct mbuf *(*altq_dequeue)(struct ifaltq *, int);
64 int (*altq_request)(struct ifaltq *, int, void *);
66 /* token bucket regulator */
67 struct tb_regulator *altq_tbr;
69 /* input traffic conditioner (doesn't belong to the output queue...) */
70 struct top_cdnr *altq_cdnr;
76 * packet attributes used by queueing disciplines.
77 * pattr_class is a discipline-dependent scheduling class that is
78 * set by a classifier.
79 * pattr_hdr and pattr_af may be used by a discipline to access
80 * the header within a mbuf. (e.g. ECN needs to update the CE bit)
81 * note that pattr_hdr could be stale after m_pullup, though link
82 * layer output routines usually don't use m_pullup. link-level
83 * compression also invalidates these fields. thus, pattr_hdr needs
84 * to be verified when a discipline touches the header.
87 void *pattr_class; /* sched class set by classifier */
88 int pattr_af; /* address family */
89 caddr_t pattr_hdr; /* saved header position in mbuf */
93 * mbuf tag to carry a queue id (and hints for ECN).
96 u_int32_t qid; /* queue id */
98 int af; /* address family */
99 void *hdr; /* saved header position in mbuf */
103 * a token-bucket regulator limits the rate that a network driver can
104 * dequeue packets from the output queue.
105 * modern cards are able to buffer a large amount of packets and dequeue
106 * too many packets at a time. this bursty dequeue behavior makes it
107 * impossible to schedule packets by queueing disciplines.
108 * a token-bucket is used to control the burst size in a device
109 * independent manner.
111 struct tb_regulator {
112 int64_t tbr_rate; /* (scaled) token bucket rate */
113 int64_t tbr_depth; /* (scaled) token bucket depth */
115 int64_t tbr_token; /* (scaled) current token */
116 int64_t tbr_filluptime; /* (scaled) time to fill up bucket */
117 u_int64_t tbr_last; /* last time token was updated */
119 int tbr_lastop; /* last dequeue operation type
120 needed for poll-and-dequeue */
124 #define ALTQF_READY 0x01 /* driver supports alternate queueing */
125 #define ALTQF_ENABLED 0x02 /* altq is in use */
126 /* ALTQF_CLASSIFY 0x04 obsolete classify packets */
127 #define ALTQF_CNDTNING 0x08 /* altq traffic conditioning is enabled */
128 #define ALTQF_DRIVER1 0x40 /* driver specific */
130 /* if_altqflags set internally only: */
131 #define ALTQF_CANTCHANGE (ALTQF_READY)
133 /* altq_dequeue 2nd arg */
134 #define ALTDQ_REMOVE 1 /* dequeue mbuf from the queue */
135 #define ALTDQ_POLL 2 /* don't dequeue mbuf from the queue */
137 /* altq request types (currently only purge is defined) */
138 #define ALTRQ_PURGE 1 /* purge all packets */
140 #define ALTQ_IS_READY(ifq) ((ifq)->altq_flags & ALTQF_READY)
142 #define ALTQ_IS_ENABLED(ifq) ((ifq)->altq_flags & ALTQF_ENABLED)
144 #define ALTQ_IS_ENABLED(ifq) 0
146 #define ALTQ_IS_CNDTNING(ifq) ((ifq)->altq_flags & ALTQF_CNDTNING)
148 #define ALTQ_SET_CNDTNING(ifq) ((ifq)->altq_flags |= ALTQF_CNDTNING)
149 #define ALTQ_CLEAR_CNDTNING(ifq) ((ifq)->altq_flags &= ~ALTQF_CNDTNING)
150 #define ALTQ_IS_ATTACHED(ifq) ((ifq)->altq_disc != NULL)
152 #define ALTQ_ENQUEUE(ifq, m, pa, err) \
153 (err) = (*(ifq)->altq_enqueue)((ifq),(m),(pa))
154 #define ALTQ_DEQUEUE(ifq, m) \
155 (m) = (*(ifq)->altq_dequeue)((ifq), ALTDQ_REMOVE)
156 #define ALTQ_POLL(ifq, m) \
157 (m) = (*(ifq)->altq_dequeue)((ifq), ALTDQ_POLL)
158 #define ALTQ_PURGE(ifq) \
159 (void)(*(ifq)->altq_request)((ifq), ALTRQ_PURGE, (void *)0)
160 #define ALTQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
161 #define TBR_IS_ENABLED(ifq) ((ifq)->altq_tbr != NULL)
163 extern int altq_attach(struct ifaltq *, int, void *,
164 int (*)(struct ifaltq *, struct mbuf *,
165 struct altq_pktattr *),
166 struct mbuf *(*)(struct ifaltq *, int),
167 int (*)(struct ifaltq *, int, void *));
168 extern int altq_detach(struct ifaltq *);
169 extern int altq_enable(struct ifaltq *);
170 extern int altq_disable(struct ifaltq *);
171 extern struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int);
172 extern int (*altq_input)(struct mbuf *, int);
173 #if 0 /* ALTQ3_CLFIER_COMPAT */
174 void altq_etherclassify(struct ifaltq *, struct mbuf *, struct altq_pktattr *);
178 #endif /* _ALTQ_IF_ALTQ_H_ */