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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_est *r)
147{
148 if (b && !gen_estimator_active(b, r))
149 return 0;
150
151 if (d->compat_tc_stats) {
152 d->tc_stats.bps = r->bps;
153 d->tc_stats.pps = r->pps;
154 }
155
156 if (d->tail)
157 return gnet_stats_copy(d, TCA_STATS_RATE_EST, r, sizeof(*r));
158
159 return 0;
160}
161EXPORT_SYMBOL(gnet_stats_copy_rate_est);
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174int
175gnet_stats_copy_queue(struct gnet_dump *d, struct gnet_stats_queue *q)
176{
177 if (d->compat_tc_stats) {
178 d->tc_stats.drops = q->drops;
179 d->tc_stats.qlen = q->qlen;
180 d->tc_stats.backlog = q->backlog;
181 d->tc_stats.overlimits = q->overlimits;
182 }
183
184 if (d->tail)
185 return gnet_stats_copy(d, TCA_STATS_QUEUE, q, sizeof(*q));
186
187 return 0;
188}
189EXPORT_SYMBOL(gnet_stats_copy_queue);
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204int
205gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
206{
207 if (d->compat_xstats) {
208 d->xstats = st;
209 d->xstats_len = len;
210 }
211
212 if (d->tail)
213 return gnet_stats_copy(d, TCA_STATS_APP, st, len);
214
215 return 0;
216}
217EXPORT_SYMBOL(gnet_stats_copy_app);
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231int
232gnet_stats_finish_copy(struct gnet_dump *d)
233{
234 if (d->tail)
235 d->tail->nla_len = skb_tail_pointer(d->skb) - (u8 *)d->tail;
236
237 if (d->compat_tc_stats)
238 if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
239 sizeof(d->tc_stats)) < 0)
240 return -1;
241
242 if (d->compat_xstats && d->xstats) {
243 if (gnet_stats_copy(d, d->compat_xstats, d->xstats,
244 d->xstats_len) < 0)
245 return -1;
246 }
247
248 spin_unlock_bh(d->lock);
249 return 0;
250}
251EXPORT_SYMBOL(gnet_stats_finish_copy);
252