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16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/interrupt.h>
20#include <linux/socket.h>
21#include <linux/rtnetlink.h>
22#include <linux/gen_stats.h>
23#include <net/netlink.h>
24#include <net/gen_stats.h>
25
26
27static inline int
28gnet_stats_copy(struct gnet_dump *d, int type, void *buf, int size)
29{
30 if (nla_put(d->skb, type, size, buf))
31 goto nla_put_failure;
32 return 0;
33
34nla_put_failure:
35 spin_unlock_bh(d->lock);
36 return -1;
37}
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57int
58gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
59 int xstats_type, spinlock_t *lock, struct gnet_dump *d)
60 __acquires(lock)
61{
62 memset(d, 0, sizeof(*d));
63
64 spin_lock_bh(lock);
65 d->lock = lock;
66 if (type)
67 d->tail = (struct nlattr *)skb_tail_pointer(skb);
68 d->skb = skb;
69 d->compat_tc_stats = tc_stats_type;
70 d->compat_xstats = xstats_type;
71
72 if (d->tail)
73 return gnet_stats_copy(d, type, NULL, 0);
74
75 return 0;
76}
77EXPORT_SYMBOL(gnet_stats_start_copy_compat);
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92int
93gnet_stats_start_copy(struct sk_buff *skb, int type, spinlock_t *lock,
94 struct gnet_dump *d)
95{
96 return gnet_stats_start_copy_compat(skb, type, 0, 0, lock, d);
97}
98EXPORT_SYMBOL(gnet_stats_start_copy);
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111int
112gnet_stats_copy_basic(struct gnet_dump *d, struct gnet_stats_basic_packed *b)
113{
114 if (d->compat_tc_stats) {
115 d->tc_stats.bytes = b->bytes;
116 d->tc_stats.packets = b->packets;
117 }
118
119 if (d->tail) {
120 struct gnet_stats_basic sb;
121
122 memset(&sb, 0, sizeof(sb));
123 sb.bytes = b->bytes;
124 sb.packets = b->packets;
125 return gnet_stats_copy(d, TCA_STATS_BASIC, &sb, sizeof(sb));
126 }
127 return 0;
128}
129EXPORT_SYMBOL(gnet_stats_copy_basic);
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143int
144gnet_stats_copy_rate_est(struct gnet_dump *d,
145 const struct gnet_stats_basic_packed *b,
146 struct gnet_stats_rate_est64 *r)
147{
148 struct gnet_stats_rate_est est;
149 int res;
150
151 if (b && !gen_estimator_active(b, r))
152 return 0;
153
154 est.bps = min_t(u64, UINT_MAX, r->bps);
155
156 est.pps = r->pps;
157
158 if (d->compat_tc_stats) {
159 d->tc_stats.bps = est.bps;
160 d->tc_stats.pps = est.pps;
161 }
162
163 if (d->tail) {
164 res = gnet_stats_copy(d, TCA_STATS_RATE_EST, &est, sizeof(est));
165 if (res < 0 || est.bps == r->bps)
166 return res;
167
168 return gnet_stats_copy(d, TCA_STATS_RATE_EST64, r, sizeof(*r));
169 }
170
171 return 0;
172}
173EXPORT_SYMBOL(gnet_stats_copy_rate_est);
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186int
187gnet_stats_copy_queue(struct gnet_dump *d, struct gnet_stats_queue *q)
188{
189 if (d->compat_tc_stats) {
190 d->tc_stats.drops = q->drops;
191 d->tc_stats.qlen = q->qlen;
192 d->tc_stats.backlog = q->backlog;
193 d->tc_stats.overlimits = q->overlimits;
194 }
195
196 if (d->tail)
197 return gnet_stats_copy(d, TCA_STATS_QUEUE, q, sizeof(*q));
198
199 return 0;
200}
201EXPORT_SYMBOL(gnet_stats_copy_queue);
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216int
217gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
218{
219 if (d->compat_xstats) {
220 d->xstats = st;
221 d->xstats_len = len;
222 }
223
224 if (d->tail)
225 return gnet_stats_copy(d, TCA_STATS_APP, st, len);
226
227 return 0;
228}
229EXPORT_SYMBOL(gnet_stats_copy_app);
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243int
244gnet_stats_finish_copy(struct gnet_dump *d)
245{
246 if (d->tail)
247 d->tail->nla_len = skb_tail_pointer(d->skb) - (u8 *)d->tail;
248
249 if (d->compat_tc_stats)
250 if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
251 sizeof(d->tc_stats)) < 0)
252 return -1;
253
254 if (d->compat_xstats && d->xstats) {
255 if (gnet_stats_copy(d, d->compat_xstats, d->xstats,
256 d->xstats_len) < 0)
257 return -1;
258 }
259
260 spin_unlock_bh(d->lock);
261 return 0;
262}
263EXPORT_SYMBOL(gnet_stats_finish_copy);
264