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33 * $KAME: altq_rmclass.h,v 1.10 2003/08/20 23:30:23 itojun Exp $
36 #ifndef _ALTQ_ALTQ_RMCLASS_H_
37 #define _ALTQ_ALTQ_RMCLASS_H_
39 #include <net/altq/altq_classq.h>
45 #define RM_MAXPRIO 8 /* Max priority */
49 typedef struct mbuf mbuf_t;
50 typedef struct rm_ifdat rm_ifdat_t;
51 typedef struct rm_class rm_class_t;
56 * Macros for dealing with time values. We assume all times are
57 * 'timevals'. `microtime' is used to get the best available clock
58 * resolution. If `microtime' *doesn't* return a value that's about
59 * ten times smaller than the average packet time on the fastest
60 * link that will use these routines, a slightly different clock
61 * scheme than this one should be used.
62 * (Bias due to truncation error in this scheme will overestimate utilization
63 * and discriminate against high bandwidth classes. To remove this bias an
64 * integrator needs to be added. The simplest integrator uses a history of
65 * 10 * avg.packet.time / min.tick.time packet completion entries. This is
66 * straight forward to add but we don't want to pay the extra memory
67 * traffic to maintain it if it's not necessary (occasionally a vendor
68 * accidentally builds a workstation with a decent clock - e.g., Sun & HP).)
71 #define RM_GETTIME(now) microtime(&now)
73 #define TV_LT(a, b) (((a)->tv_sec < (b)->tv_sec) || \
74 (((a)->tv_usec < (b)->tv_usec) && ((a)->tv_sec <= (b)->tv_sec)))
76 #define TV_DELTA(a, b, delta) { \
79 delta = (a)->tv_usec - (b)->tv_usec; \
80 if ((xxs = (a)->tv_sec - (b)->tv_sec)) { \
84 printf("rm_class: bogus time values\n"); */ \
97 #define TV_ADD_DELTA(a, delta, res) { \
98 int xxus = (a)->tv_usec + (delta); \
100 (res)->tv_sec = (a)->tv_sec; \
101 while (xxus >= 1000000) { \
105 (res)->tv_usec = xxus; \
108 #define RM_TIMEOUT 2 /* 1 Clock tick. */
111 #define RM_MAXQUEUED 1 /* this isn't used in ALTQ/CBQ */
113 #define RM_MAXQUEUED 16 /* Max number of packets downstream of CBQ */
115 #define RM_MAXQUEUE 64 /* Max queue length */
116 #define RM_FILTER_GAIN 5 /* log2 of gain, e.g., 5 => 31/32 */
117 #define RM_POWER (1 << RM_FILTER_GAIN)
118 #define RM_MAXDEPTH 32
119 #define RM_NS_PER_SEC (1000000000)
121 typedef struct _rm_class_stats_ {
125 struct pktcntr xmit_cnt; /* packets sent in this class */
126 struct pktcntr drop_cnt; /* dropped packets */
127 u_int over; /* # times went over limit */
128 u_int borrows; /* # times tried to borrow */
129 u_int overactions; /* # times invoked overlimit action */
130 u_int delays; /* # times invoked delay actions */
134 * CBQ Class state structure
137 class_queue_t *q_; /* Queue of packets */
139 int pri_; /* Class priority. */
140 int depth_; /* Class depth */
141 u_int ns_per_byte_; /* NanoSeconds per byte. */
142 u_int maxrate_; /* Bytes per second for this class. */
143 u_int allotment_; /* Fraction of link bandwidth. */
144 u_int w_allotment_; /* Weighted allotment for WRR */
145 int bytes_alloc_; /* Allocation for round of WRR */
151 int sleeping_; /* != 0 if delaying */
152 int qthresh_; /* Queue threshold for formal link sharing */
153 int leaf_; /* Note whether leaf class or not.*/
155 rm_class_t *children_; /* Children of this class */
156 rm_class_t *next_; /* Next pointer, used if child */
158 rm_class_t *peer_; /* Peer class */
159 rm_class_t *borrow_; /* Borrow class */
160 rm_class_t *parent_; /* Parent class */
162 void (*overlimit)(struct rm_class *, struct rm_class *);
163 void (*drop)(struct rm_class *); /* Class drop action. */
166 struct red *red_; /* RED state pointer */
167 struct codel *codel_; /* codel state pointer */
169 #define red_ cl_aqm_.red_
170 #define codel_ cl_aqm_.codel_
171 struct altq_pktattr *pktattr_; /* saved hdr used by RED/ECN */
174 int last_pkttime_; /* saved pkt_time */
175 struct timeval undertime_; /* time can next send */
176 struct timeval last_; /* time last packet sent */
177 struct timeval overtime_;
178 struct callout callout_; /* for timeout() calls */
180 rm_class_stats_t stats_; /* Class Statistics */
184 * CBQ Interface state
187 int queued_; /* # pkts queued downstream */
188 int efficient_; /* Link Efficiency bit */
189 int wrr_; /* Enable Weighted Round-Robin */
190 u_long ns_per_byte_; /* Link byte speed. */
191 int maxqueued_; /* Max packets to queue */
192 int maxpkt_; /* Max packet size. */
193 int qi_; /* In/out pointers for downstream */
194 int qo_; /* packets */
197 * Active class state and WRR state.
199 rm_class_t *active_[RM_MAXPRIO]; /* Active cl's in each pri */
200 int na_[RM_MAXPRIO]; /* # of active cl's in a pri */
201 int num_[RM_MAXPRIO]; /* # of cl's per pri */
202 int alloc_[RM_MAXPRIO]; /* Byte Allocation */
203 u_long M_[RM_MAXPRIO]; /* WRR weights. */
206 * Network Interface/Solaris Queue state pointer.
209 rm_class_t *default_; /* Default Pkt class, BE */
210 rm_class_t *root_; /* Root Link class. */
211 rm_class_t *ctl_; /* Control Traffic class. */
212 void (*restart)(struct ifaltq *); /* Restart routine. */
215 * Current packet downstream packet state and dynamic state.
217 rm_class_t *borrowed_[RM_MAXQUEUED]; /* Class borrowed last */
218 rm_class_t *class_[RM_MAXQUEUED]; /* class sending */
219 int curlen_[RM_MAXQUEUED]; /* Current pktlen */
220 struct timeval now_[RM_MAXQUEUED]; /* Current packet time. */
221 int is_overlimit_[RM_MAXQUEUED];/* Current packet time. */
223 int cutoff_; /* Cut-off depth for borrowing */
225 struct timeval ifnow_; /* expected xmit completion time */
227 int maxiftime_; /* max delay inside interface */
229 rm_class_t *pollcache_; /* cached rm_class by poll operation */
232 /* flags for rmc_init and rmc_newclass */
233 /* class flags; must be the same as class flags in altq_cbq.h */
234 #define RMCF_RED 0x0001
235 #define RMCF_ECN 0x0002
236 #define RMCF_RIO 0x0004
237 #define RMCF_FLOWVALVE 0x0008 /* use flowvalve (aka penalty-box) */
238 #define RMCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */
239 #define RMCF_CODEL 0x0040
241 /* flags for rmc_init */
242 #define RMCF_WRR 0x0100
243 #define RMCF_EFFICIENT 0x0200
245 #define is_a_parent_class(cl) ((cl)->children_ != NULL)
247 extern rm_class_t *rmc_newclass(int, struct rm_ifdat *, u_int,
248 void (*)(struct rm_class *, struct rm_class *),
249 int, struct rm_class *, struct rm_class *,
250 u_int, int, u_int, int, int);
251 extern void rmc_delete_class(struct rm_ifdat *, struct rm_class *);
252 extern int rmc_modclass(struct rm_class *, u_int, int,
253 u_int, int, u_int, int);
254 extern void rmc_init(struct ifaltq *, struct rm_ifdat *, u_int,
255 void (*)(struct ifaltq *),
256 int, int, u_int, int, u_int, int);
257 extern int rmc_queue_packet(struct rm_class *, mbuf_t *);
258 extern mbuf_t *rmc_dequeue_next(struct rm_ifdat *, int);
259 extern void rmc_update_class_util(struct rm_ifdat *);
260 extern void rmc_delay_action(struct rm_class *, struct rm_class *);
261 extern void rmc_dropall(struct rm_class *);
262 extern int rmc_get_weight(struct rm_ifdat *, int);
270 #endif /* _ALTQ_ALTQ_RMCLASS_H_ */