act_pedit.c (8c57a5e7b2820f349c95b8c8393fec1e0f4070d2) act_pedit.c (a85a970af265f156740977168b542234511b28a8)
1/*
2 * net/sched/act_pedit.c Generic packet editor
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *

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21#include <net/netlink.h>
22#include <net/pkt_sched.h>
23#include <linux/tc_act/tc_pedit.h>
24#include <net/tc_act/tc_pedit.h>
25
26#define PEDIT_TAB_MASK 15
27
28static int pedit_net_id;
1/*
2 * net/sched/act_pedit.c Generic packet editor
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *

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21#include <net/netlink.h>
22#include <net/pkt_sched.h>
23#include <linux/tc_act/tc_pedit.h>
24#include <net/tc_act/tc_pedit.h>
25
26#define PEDIT_TAB_MASK 15
27
28static int pedit_net_id;
29static struct tc_action_ops act_pedit_ops;
29
30static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
31 [TCA_PEDIT_PARMS] = { .len = sizeof(struct tc_pedit) },
32};
33
34static int tcf_pedit_init(struct net *net, struct nlattr *nla,
30
31static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
32 [TCA_PEDIT_PARMS] = { .len = sizeof(struct tc_pedit) },
33};
34
35static int tcf_pedit_init(struct net *net, struct nlattr *nla,
35 struct nlattr *est, struct tc_action *a,
36 struct nlattr *est, struct tc_action **a,
36 int ovr, int bind)
37{
38 struct tc_action_net *tn = net_generic(net, pedit_net_id);
39 struct nlattr *tb[TCA_PEDIT_MAX + 1];
40 struct tc_pedit *parm;
41 int ret = 0, err;
42 struct tcf_pedit *p;
43 struct tc_pedit_key *keys = NULL;

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56 ksize = parm->nkeys * sizeof(struct tc_pedit_key);
57 if (nla_len(tb[TCA_PEDIT_PARMS]) < sizeof(*parm) + ksize)
58 return -EINVAL;
59
60 if (!tcf_hash_check(tn, parm->index, a, bind)) {
61 if (!parm->nkeys)
62 return -EINVAL;
63 ret = tcf_hash_create(tn, parm->index, est, a,
37 int ovr, int bind)
38{
39 struct tc_action_net *tn = net_generic(net, pedit_net_id);
40 struct nlattr *tb[TCA_PEDIT_MAX + 1];
41 struct tc_pedit *parm;
42 int ret = 0, err;
43 struct tcf_pedit *p;
44 struct tc_pedit_key *keys = NULL;

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57 ksize = parm->nkeys * sizeof(struct tc_pedit_key);
58 if (nla_len(tb[TCA_PEDIT_PARMS]) < sizeof(*parm) + ksize)
59 return -EINVAL;
60
61 if (!tcf_hash_check(tn, parm->index, a, bind)) {
62 if (!parm->nkeys)
63 return -EINVAL;
64 ret = tcf_hash_create(tn, parm->index, est, a,
64 sizeof(*p), bind, false);
65 &act_pedit_ops, bind, false);
65 if (ret)
66 return ret;
66 if (ret)
67 return ret;
67 p = to_pedit(a);
68 p = to_pedit(*a);
68 keys = kmalloc(ksize, GFP_KERNEL);
69 if (keys == NULL) {
69 keys = kmalloc(ksize, GFP_KERNEL);
70 if (keys == NULL) {
70 tcf_hash_cleanup(a, est);
71 tcf_hash_cleanup(*a, est);
71 return -ENOMEM;
72 }
73 ret = ACT_P_CREATED;
74 } else {
75 if (bind)
76 return 0;
72 return -ENOMEM;
73 }
74 ret = ACT_P_CREATED;
75 } else {
76 if (bind)
77 return 0;
77 tcf_hash_release(a, bind);
78 tcf_hash_release(*a, bind);
78 if (!ovr)
79 return -EEXIST;
79 if (!ovr)
80 return -EEXIST;
80 p = to_pedit(a);
81 p = to_pedit(*a);
81 if (p->tcfp_nkeys && p->tcfp_nkeys != parm->nkeys) {
82 keys = kmalloc(ksize, GFP_KERNEL);
83 if (keys == NULL)
84 return -ENOMEM;
85 }
86 }
87
88 spin_lock_bh(&p->tcf_lock);
89 p->tcfp_flags = parm->flags;
90 p->tcf_action = parm->action;
91 if (keys) {
92 kfree(p->tcfp_keys);
93 p->tcfp_keys = keys;
94 p->tcfp_nkeys = parm->nkeys;
95 }
96 memcpy(p->tcfp_keys, parm->keys, ksize);
97 spin_unlock_bh(&p->tcf_lock);
98 if (ret == ACT_P_CREATED)
82 if (p->tcfp_nkeys && p->tcfp_nkeys != parm->nkeys) {
83 keys = kmalloc(ksize, GFP_KERNEL);
84 if (keys == NULL)
85 return -ENOMEM;
86 }
87 }
88
89 spin_lock_bh(&p->tcf_lock);
90 p->tcfp_flags = parm->flags;
91 p->tcf_action = parm->action;
92 if (keys) {
93 kfree(p->tcfp_keys);
94 p->tcfp_keys = keys;
95 p->tcfp_nkeys = parm->nkeys;
96 }
97 memcpy(p->tcfp_keys, parm->keys, ksize);
98 spin_unlock_bh(&p->tcf_lock);
99 if (ret == ACT_P_CREATED)
99 tcf_hash_insert(tn, a);
100 tcf_hash_insert(tn, *a);
100 return ret;
101}
102
103static void tcf_pedit_cleanup(struct tc_action *a, int bind)
104{
101 return ret;
102}
103
104static void tcf_pedit_cleanup(struct tc_action *a, int bind)
105{
105 struct tcf_pedit *p = a->priv;
106 struct tcf_pedit *p = to_pedit(a);
106 struct tc_pedit_key *keys = p->tcfp_keys;
107 kfree(keys);
108}
109
110static int tcf_pedit(struct sk_buff *skb, const struct tc_action *a,
111 struct tcf_result *res)
112{
107 struct tc_pedit_key *keys = p->tcfp_keys;
108 kfree(keys);
109}
110
111static int tcf_pedit(struct sk_buff *skb, const struct tc_action *a,
112 struct tcf_result *res)
113{
113 struct tcf_pedit *p = a->priv;
114 struct tcf_pedit *p = to_pedit(a);
114 int i;
115 unsigned int off;
116
117 if (skb_unclone(skb, GFP_ATOMIC))
118 return p->tcf_action;
119
120 off = skb_network_offset(skb);
121
122 spin_lock(&p->tcf_lock);
123
115 int i;
116 unsigned int off;
117
118 if (skb_unclone(skb, GFP_ATOMIC))
119 return p->tcf_action;
120
121 off = skb_network_offset(skb);
122
123 spin_lock(&p->tcf_lock);
124
124 p->tcf_tm.lastuse = jiffies;
125 tcf_lastuse_update(&p->tcf_tm);
125
126 if (p->tcfp_nkeys > 0) {
127 struct tc_pedit_key *tkey = p->tcfp_keys;
128
129 for (i = p->tcfp_nkeys; i > 0; i--, tkey++) {
130 u32 *ptr, _data;
131 int offset = tkey->off;
132

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172 spin_unlock(&p->tcf_lock);
173 return p->tcf_action;
174}
175
176static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,
177 int bind, int ref)
178{
179 unsigned char *b = skb_tail_pointer(skb);
126
127 if (p->tcfp_nkeys > 0) {
128 struct tc_pedit_key *tkey = p->tcfp_keys;
129
130 for (i = p->tcfp_nkeys; i > 0; i--, tkey++) {
131 u32 *ptr, _data;
132 int offset = tkey->off;
133

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173 spin_unlock(&p->tcf_lock);
174 return p->tcf_action;
175}
176
177static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,
178 int bind, int ref)
179{
180 unsigned char *b = skb_tail_pointer(skb);
180 struct tcf_pedit *p = a->priv;
181 struct tcf_pedit *p = to_pedit(a);
181 struct tc_pedit *opt;
182 struct tcf_t t;
183 int s;
184
185 s = sizeof(*opt) + p->tcfp_nkeys * sizeof(struct tc_pedit_key);
186
187 /* netlink spinlocks held above us - must use ATOMIC */
188 opt = kzalloc(s, GFP_ATOMIC);

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195 opt->nkeys = p->tcfp_nkeys;
196 opt->flags = p->tcfp_flags;
197 opt->action = p->tcf_action;
198 opt->refcnt = p->tcf_refcnt - ref;
199 opt->bindcnt = p->tcf_bindcnt - bind;
200
201 if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
202 goto nla_put_failure;
182 struct tc_pedit *opt;
183 struct tcf_t t;
184 int s;
185
186 s = sizeof(*opt) + p->tcfp_nkeys * sizeof(struct tc_pedit_key);
187
188 /* netlink spinlocks held above us - must use ATOMIC */
189 opt = kzalloc(s, GFP_ATOMIC);

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196 opt->nkeys = p->tcfp_nkeys;
197 opt->flags = p->tcfp_flags;
198 opt->action = p->tcf_action;
199 opt->refcnt = p->tcf_refcnt - ref;
200 opt->bindcnt = p->tcf_bindcnt - bind;
201
202 if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
203 goto nla_put_failure;
203 t.install = jiffies_to_clock_t(jiffies - p->tcf_tm.install);
204 t.lastuse = jiffies_to_clock_t(jiffies - p->tcf_tm.lastuse);
205 t.expires = jiffies_to_clock_t(p->tcf_tm.expires);
206 if (nla_put(skb, TCA_PEDIT_TM, sizeof(t), &t))
204
205 tcf_tm_dump(&t, &p->tcf_tm);
206 if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD))
207 goto nla_put_failure;
207 goto nla_put_failure;
208
208 kfree(opt);
209 return skb->len;
210
211nla_put_failure:
212 nlmsg_trim(skb, b);
213 kfree(opt);
214 return -1;
215}
216
217static int tcf_pedit_walker(struct net *net, struct sk_buff *skb,
218 struct netlink_callback *cb, int type,
209 kfree(opt);
210 return skb->len;
211
212nla_put_failure:
213 nlmsg_trim(skb, b);
214 kfree(opt);
215 return -1;
216}
217
218static int tcf_pedit_walker(struct net *net, struct sk_buff *skb,
219 struct netlink_callback *cb, int type,
219 struct tc_action *a)
220 const struct tc_action_ops *ops)
220{
221 struct tc_action_net *tn = net_generic(net, pedit_net_id);
222
221{
222 struct tc_action_net *tn = net_generic(net, pedit_net_id);
223
223 return tcf_generic_walker(tn, skb, cb, type, a);
224 return tcf_generic_walker(tn, skb, cb, type, ops);
224}
225
225}
226
226static int tcf_pedit_search(struct net *net, struct tc_action *a, u32 index)
227static int tcf_pedit_search(struct net *net, struct tc_action **a, u32 index)
227{
228 struct tc_action_net *tn = net_generic(net, pedit_net_id);
229
230 return tcf_hash_search(tn, a, index);
231}
232
233static struct tc_action_ops act_pedit_ops = {
234 .kind = "pedit",
235 .type = TCA_ACT_PEDIT,
236 .owner = THIS_MODULE,
237 .act = tcf_pedit,
238 .dump = tcf_pedit_dump,
239 .cleanup = tcf_pedit_cleanup,
240 .init = tcf_pedit_init,
241 .walk = tcf_pedit_walker,
242 .lookup = tcf_pedit_search,
228{
229 struct tc_action_net *tn = net_generic(net, pedit_net_id);
230
231 return tcf_hash_search(tn, a, index);
232}
233
234static struct tc_action_ops act_pedit_ops = {
235 .kind = "pedit",
236 .type = TCA_ACT_PEDIT,
237 .owner = THIS_MODULE,
238 .act = tcf_pedit,
239 .dump = tcf_pedit_dump,
240 .cleanup = tcf_pedit_cleanup,
241 .init = tcf_pedit_init,
242 .walk = tcf_pedit_walker,
243 .lookup = tcf_pedit_search,
244 .size = sizeof(struct tcf_pedit),
243};
244
245static __net_init int pedit_init_net(struct net *net)
246{
247 struct tc_action_net *tn = net_generic(net, pedit_net_id);
248
249 return tc_action_net_init(tn, &act_pedit_ops, PEDIT_TAB_MASK);
250}

--- 32 unchanged lines hidden --- 		245};
246
247static __net_init int pedit_init_net(struct net *net)
248{
249 struct tc_action_net *tn = net_generic(net, pedit_net_id);
250
251 return tc_action_net_init(tn, &act_pedit_ops, PEDIT_TAB_MASK);
252}

--- 32 unchanged lines hidden ---