1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* include/net/act_generic.h
*
*/
#ifndef _NET_ACT_GENERIC_H
#define _NET_ACT_GENERIC_H
static inline int tcf_defact_release(struct tcf_defact *p, int bind)
{
int ret = 0;
if (p) {
if (bind) {
p->bindcnt--;
}
p->refcnt--;
if (p->bindcnt <= 0 && p->refcnt <= 0) {
kfree(p->defdata);
tcf_hash_destroy(p);
ret = 1;
}
}
return ret;
}
static inline int
alloc_defdata(struct tcf_defact *p, u32 datalen, void *defdata)
{
p->defdata = kmalloc(datalen, GFP_KERNEL);
if (p->defdata == NULL)
return -ENOMEM;
p->datalen = datalen;
memcpy(p->defdata, defdata, datalen);
return 0;
}
static inline int
realloc_defdata(struct tcf_defact *p, u32 datalen, void *defdata)
{
/* safer to be just brute force for now */
kfree(p->defdata);
return alloc_defdata(p, datalen, defdata);
}
static inline int
tcf_defact_init(struct rtattr *rta, struct rtattr *est,
struct tc_action *a, int ovr, int bind)
{
struct rtattr *tb[TCA_DEF_MAX];
struct tc_defact *parm;
struct tcf_defact *p;
void *defdata;
u32 datalen = 0;
int ret = 0;
if (rta == NULL || rtattr_parse_nested(tb, TCA_DEF_MAX, rta) < 0)
return -EINVAL;
if (tb[TCA_DEF_PARMS - 1] == NULL ||
RTA_PAYLOAD(tb[TCA_DEF_PARMS - 1]) < sizeof(*parm))
return -EINVAL;
parm = RTA_DATA(tb[TCA_DEF_PARMS - 1]);
defdata = RTA_DATA(tb[TCA_DEF_DATA - 1]);
if (defdata == NULL)
return -EINVAL;
datalen = RTA_PAYLOAD(tb[TCA_DEF_DATA - 1]);
if (datalen <= 0)
return -EINVAL;
p = tcf_hash_check(parm->index, a, ovr, bind);
if (p == NULL) {
p = tcf_hash_create(parm->index, est, a, sizeof(*p), ovr, bind);
if (p == NULL)
return -ENOMEM;
ret = alloc_defdata(p, datalen, defdata);
if (ret < 0) {
kfree(p);
return ret;
}
ret = ACT_P_CREATED;
} else {
if (!ovr) {
tcf_defact_release(p, bind);
return -EEXIST;
}
realloc_defdata(p, datalen, defdata);
}
spin_lock_bh(&p->lock);
p->action = parm->action;
spin_unlock_bh(&p->lock);
if (ret == ACT_P_CREATED)
tcf_hash_insert(p);
return ret;
}
static inline int tcf_defact_cleanup(struct tc_action *a, int bind)
{
struct tcf_defact *p = PRIV(a, defact);
if (p != NULL)
return tcf_defact_release(p, bind);
return 0;
}
static inline int
tcf_defact_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
unsigned char *b = skb->tail;
struct tc_defact opt;
struct tcf_defact *p = PRIV(a, defact);
struct tcf_t t;
opt.index = p->index;
opt.refcnt = p->refcnt - ref;
opt.bindcnt = p->bindcnt - bind;
opt.action = p->action;
RTA_PUT(skb, TCA_DEF_PARMS, sizeof(opt), &opt);
RTA_PUT(skb, TCA_DEF_DATA, p->datalen, p->defdata);
t.install = jiffies_to_clock_t(jiffies - p->tm.install);
t.lastuse = jiffies_to_clock_t(jiffies - p->tm.lastuse);
t.expires = jiffies_to_clock_t(p->tm.expires);
RTA_PUT(skb, TCA_DEF_TM, sizeof(t), &t);
return skb->len;
rtattr_failure:
skb_trim(skb, b - skb->data);
return -1;
}
#define tca_use_default_ops \
.dump = tcf_defact_dump, \
.cleanup = tcf_defact_cleanup, \
.init = tcf_defact_init, \
.walk = tcf_generic_walker, \
#define tca_use_default_defines(name) \
static u32 idx_gen; \
static struct tcf_defact *tcf_##name_ht[MY_TAB_SIZE]; \
static DEFINE_RWLOCK(##name_lock);
#endif /* _NET_ACT_GENERIC_H */
|
