]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - net/sched/act_api.c
2 * net/sched/act_api.c Packet action API.
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.
9 * Author: Jamal Hadi Salim
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/string.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/init.h>
21 #include <linux/kmod.h>
22 #include <linux/err.h>
23 #include <linux/module.h>
24 #include <net/net_namespace.h>
26 #include <net/sch_generic.h>
27 #include <net/act_api.h>
28 #include <net/netlink.h>
30 void tcf_hash_destroy(struct tcf_common
*p
, struct tcf_hashinfo
*hinfo
)
32 unsigned int h
= tcf_hash(p
->tcfc_index
, hinfo
->hmask
);
33 struct tcf_common
**p1p
;
35 for (p1p
= &hinfo
->htab
[h
]; *p1p
; p1p
= &(*p1p
)->tcfc_next
) {
37 write_lock_bh(hinfo
->lock
);
39 write_unlock_bh(hinfo
->lock
);
40 gen_kill_estimator(&p
->tcfc_bstats
,
43 * gen_estimator est_timer() might access p->tcfc_lock
44 * or bstats, wait a RCU grace period before freeing p
46 kfree_rcu(p
, tcfc_rcu
);
52 EXPORT_SYMBOL(tcf_hash_destroy
);
54 int tcf_hash_release(struct tcf_common
*p
, int bind
,
55 struct tcf_hashinfo
*hinfo
)
64 if (p
->tcfc_bindcnt
<= 0 && p
->tcfc_refcnt
<= 0) {
65 tcf_hash_destroy(p
, hinfo
);
71 EXPORT_SYMBOL(tcf_hash_release
);
73 static int tcf_dump_walker(struct sk_buff
*skb
, struct netlink_callback
*cb
,
74 struct tc_action
*a
, struct tcf_hashinfo
*hinfo
)
77 int err
= 0, index
= -1, i
= 0, s_i
= 0, n_i
= 0;
80 read_lock_bh(hinfo
->lock
);
84 for (i
= 0; i
< (hinfo
->hmask
+ 1); i
++) {
85 p
= hinfo
->htab
[tcf_hash(i
, hinfo
->hmask
)];
87 for (; p
; p
= p
->tcfc_next
) {
94 nest
= nla_nest_start(skb
, a
->order
);
97 err
= tcf_action_dump_1(skb
, a
, 0, 0);
100 nlmsg_trim(skb
, nest
);
103 nla_nest_end(skb
, nest
);
105 if (n_i
>= TCA_ACT_MAX_PRIO
)
110 read_unlock_bh(hinfo
->lock
);
116 nla_nest_cancel(skb
, nest
);
120 static int tcf_del_walker(struct sk_buff
*skb
, struct tc_action
*a
,
121 struct tcf_hashinfo
*hinfo
)
123 struct tcf_common
*p
, *s_p
;
127 nest
= nla_nest_start(skb
, a
->order
);
129 goto nla_put_failure
;
130 NLA_PUT_STRING(skb
, TCA_KIND
, a
->ops
->kind
);
131 for (i
= 0; i
< (hinfo
->hmask
+ 1); i
++) {
132 p
= hinfo
->htab
[tcf_hash(i
, hinfo
->hmask
)];
136 if (ACT_P_DELETED
== tcf_hash_release(p
, 0, hinfo
))
137 module_put(a
->ops
->owner
);
142 NLA_PUT_U32(skb
, TCA_FCNT
, n_i
);
143 nla_nest_end(skb
, nest
);
147 nla_nest_cancel(skb
, nest
);
151 int tcf_generic_walker(struct sk_buff
*skb
, struct netlink_callback
*cb
,
152 int type
, struct tc_action
*a
)
154 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
156 if (type
== RTM_DELACTION
) {
157 return tcf_del_walker(skb
, a
, hinfo
);
158 } else if (type
== RTM_GETACTION
) {
159 return tcf_dump_walker(skb
, cb
, a
, hinfo
);
161 WARN(1, "tcf_generic_walker: unknown action %d\n", type
);
165 EXPORT_SYMBOL(tcf_generic_walker
);
167 struct tcf_common
*tcf_hash_lookup(u32 index
, struct tcf_hashinfo
*hinfo
)
169 struct tcf_common
*p
;
171 read_lock_bh(hinfo
->lock
);
172 for (p
= hinfo
->htab
[tcf_hash(index
, hinfo
->hmask
)]; p
;
174 if (p
->tcfc_index
== index
)
177 read_unlock_bh(hinfo
->lock
);
181 EXPORT_SYMBOL(tcf_hash_lookup
);
183 u32
tcf_hash_new_index(u32
*idx_gen
, struct tcf_hashinfo
*hinfo
)
190 } while (tcf_hash_lookup(val
, hinfo
));
192 return (*idx_gen
= val
);
194 EXPORT_SYMBOL(tcf_hash_new_index
);
196 int tcf_hash_search(struct tc_action
*a
, u32 index
)
198 struct tcf_hashinfo
*hinfo
= a
->ops
->hinfo
;
199 struct tcf_common
*p
= tcf_hash_lookup(index
, hinfo
);
207 EXPORT_SYMBOL(tcf_hash_search
);
209 struct tcf_common
*tcf_hash_check(u32 index
, struct tc_action
*a
, int bind
,
210 struct tcf_hashinfo
*hinfo
)
212 struct tcf_common
*p
= NULL
;
213 if (index
&& (p
= tcf_hash_lookup(index
, hinfo
)) != NULL
) {
221 EXPORT_SYMBOL(tcf_hash_check
);
223 struct tcf_common
*tcf_hash_create(u32 index
, struct nlattr
*est
,
224 struct tc_action
*a
, int size
, int bind
,
225 u32
*idx_gen
, struct tcf_hashinfo
*hinfo
)
227 struct tcf_common
*p
= kzalloc(size
, GFP_KERNEL
);
230 return ERR_PTR(-ENOMEM
);
235 spin_lock_init(&p
->tcfc_lock
);
236 p
->tcfc_index
= index
? index
: tcf_hash_new_index(idx_gen
, hinfo
);
237 p
->tcfc_tm
.install
= jiffies
;
238 p
->tcfc_tm
.lastuse
= jiffies
;
240 int err
= gen_new_estimator(&p
->tcfc_bstats
, &p
->tcfc_rate_est
,
248 a
->priv
= (void *) p
;
251 EXPORT_SYMBOL(tcf_hash_create
);
253 void tcf_hash_insert(struct tcf_common
*p
, struct tcf_hashinfo
*hinfo
)
255 unsigned int h
= tcf_hash(p
->tcfc_index
, hinfo
->hmask
);
257 write_lock_bh(hinfo
->lock
);
258 p
->tcfc_next
= hinfo
->htab
[h
];
260 write_unlock_bh(hinfo
->lock
);
262 EXPORT_SYMBOL(tcf_hash_insert
);
264 static struct tc_action_ops
*act_base
= NULL
;
265 static DEFINE_RWLOCK(act_mod_lock
);
267 int tcf_register_action(struct tc_action_ops
*act
)
269 struct tc_action_ops
*a
, **ap
;
271 write_lock(&act_mod_lock
);
272 for (ap
= &act_base
; (a
= *ap
) != NULL
; ap
= &a
->next
) {
273 if (act
->type
== a
->type
|| (strcmp(act
->kind
, a
->kind
) == 0)) {
274 write_unlock(&act_mod_lock
);
280 write_unlock(&act_mod_lock
);
283 EXPORT_SYMBOL(tcf_register_action
);
285 int tcf_unregister_action(struct tc_action_ops
*act
)
287 struct tc_action_ops
*a
, **ap
;
290 write_lock(&act_mod_lock
);
291 for (ap
= &act_base
; (a
= *ap
) != NULL
; ap
= &a
->next
)
299 write_unlock(&act_mod_lock
);
302 EXPORT_SYMBOL(tcf_unregister_action
);
305 static struct tc_action_ops
*tc_lookup_action_n(char *kind
)
307 struct tc_action_ops
*a
= NULL
;
310 read_lock(&act_mod_lock
);
311 for (a
= act_base
; a
; a
= a
->next
) {
312 if (strcmp(kind
, a
->kind
) == 0) {
313 if (!try_module_get(a
->owner
)) {
314 read_unlock(&act_mod_lock
);
320 read_unlock(&act_mod_lock
);
325 /* lookup by nlattr */
326 static struct tc_action_ops
*tc_lookup_action(struct nlattr
*kind
)
328 struct tc_action_ops
*a
= NULL
;
331 read_lock(&act_mod_lock
);
332 for (a
= act_base
; a
; a
= a
->next
) {
333 if (nla_strcmp(kind
, a
->kind
) == 0) {
334 if (!try_module_get(a
->owner
)) {
335 read_unlock(&act_mod_lock
);
341 read_unlock(&act_mod_lock
);
348 static struct tc_action_ops
*tc_lookup_action_id(u32 type
)
350 struct tc_action_ops
*a
= NULL
;
353 read_lock(&act_mod_lock
);
354 for (a
= act_base
; a
; a
= a
->next
) {
355 if (a
->type
== type
) {
356 if (!try_module_get(a
->owner
)) {
357 read_unlock(&act_mod_lock
);
363 read_unlock(&act_mod_lock
);
369 int tcf_action_exec(struct sk_buff
*skb
, const struct tc_action
*act
,
370 struct tcf_result
*res
)
372 const struct tc_action
*a
;
375 if (skb
->tc_verd
& TC_NCLS
) {
376 skb
->tc_verd
= CLR_TC_NCLS(skb
->tc_verd
);
380 while ((a
= act
) != NULL
) {
382 if (a
->ops
&& a
->ops
->act
) {
383 ret
= a
->ops
->act(skb
, a
, res
);
384 if (TC_MUNGED
& skb
->tc_verd
) {
385 /* copied already, allow trampling */
386 skb
->tc_verd
= SET_TC_OK2MUNGE(skb
->tc_verd
);
387 skb
->tc_verd
= CLR_TC_MUNGED(skb
->tc_verd
);
389 if (ret
== TC_ACT_REPEAT
)
390 goto repeat
; /* we need a ttl - JHS */
391 if (ret
!= TC_ACT_PIPE
)
399 EXPORT_SYMBOL(tcf_action_exec
);
401 void tcf_action_destroy(struct tc_action
*act
, int bind
)
405 for (a
= act
; a
; a
= act
) {
406 if (a
->ops
&& a
->ops
->cleanup
) {
407 if (a
->ops
->cleanup(a
, bind
) == ACT_P_DELETED
)
408 module_put(a
->ops
->owner
);
412 /*FIXME: Remove later - catch insertion bugs*/
413 WARN(1, "tcf_action_destroy: BUG? destroying NULL ops\n");
421 tcf_action_dump_old(struct sk_buff
*skb
, struct tc_action
*a
, int bind
, int ref
)
425 if (a
->ops
== NULL
|| a
->ops
->dump
== NULL
)
427 return a
->ops
->dump(skb
, a
, bind
, ref
);
431 tcf_action_dump_1(struct sk_buff
*skb
, struct tc_action
*a
, int bind
, int ref
)
434 unsigned char *b
= skb_tail_pointer(skb
);
437 if (a
->ops
== NULL
|| a
->ops
->dump
== NULL
)
440 NLA_PUT_STRING(skb
, TCA_KIND
, a
->ops
->kind
);
441 if (tcf_action_copy_stats(skb
, a
, 0))
442 goto nla_put_failure
;
443 nest
= nla_nest_start(skb
, TCA_OPTIONS
);
445 goto nla_put_failure
;
446 err
= tcf_action_dump_old(skb
, a
, bind
, ref
);
448 nla_nest_end(skb
, nest
);
456 EXPORT_SYMBOL(tcf_action_dump_1
);
459 tcf_action_dump(struct sk_buff
*skb
, struct tc_action
*act
, int bind
, int ref
)
465 while ((a
= act
) != NULL
) {
467 nest
= nla_nest_start(skb
, a
->order
);
469 goto nla_put_failure
;
470 err
= tcf_action_dump_1(skb
, a
, bind
, ref
);
473 nla_nest_end(skb
, nest
);
481 nla_nest_cancel(skb
, nest
);
485 struct tc_action
*tcf_action_init_1(struct nlattr
*nla
, struct nlattr
*est
,
486 char *name
, int ovr
, int bind
)
489 struct tc_action_ops
*a_o
;
490 char act_name
[IFNAMSIZ
];
491 struct nlattr
*tb
[TCA_ACT_MAX
+ 1];
496 err
= nla_parse_nested(tb
, TCA_ACT_MAX
, nla
, NULL
);
500 kind
= tb
[TCA_ACT_KIND
];
503 if (nla_strlcpy(act_name
, kind
, IFNAMSIZ
) >= IFNAMSIZ
)
507 if (strlcpy(act_name
, name
, IFNAMSIZ
) >= IFNAMSIZ
)
511 a_o
= tc_lookup_action_n(act_name
);
513 #ifdef CONFIG_MODULES
515 request_module("act_%s", act_name
);
518 a_o
= tc_lookup_action_n(act_name
);
520 /* We dropped the RTNL semaphore in order to
521 * perform the module load. So, even if we
522 * succeeded in loading the module we have to
523 * tell the caller to replay the request. We
524 * indicate this using -EAGAIN.
536 a
= kzalloc(sizeof(*a
), GFP_KERNEL
);
540 /* backward compatibility for policer */
542 err
= a_o
->init(tb
[TCA_ACT_OPTIONS
], est
, a
, ovr
, bind
);
544 err
= a_o
->init(nla
, est
, a
, ovr
, bind
);
548 /* module count goes up only when brand new policy is created
549 * if it exists and is only bound to in a_o->init() then
550 * ACT_P_CREATED is not returned (a zero is).
552 if (err
!= ACT_P_CREATED
)
553 module_put(a_o
->owner
);
561 module_put(a_o
->owner
);
566 struct tc_action
*tcf_action_init(struct nlattr
*nla
, struct nlattr
*est
,
567 char *name
, int ovr
, int bind
)
569 struct nlattr
*tb
[TCA_ACT_MAX_PRIO
+ 1];
570 struct tc_action
*head
= NULL
, *act
, *act_prev
= NULL
;
574 err
= nla_parse_nested(tb
, TCA_ACT_MAX_PRIO
, nla
, NULL
);
578 for (i
= 1; i
<= TCA_ACT_MAX_PRIO
&& tb
[i
]; i
++) {
579 act
= tcf_action_init_1(tb
[i
], est
, name
, ovr
, bind
);
587 act_prev
->next
= act
;
594 tcf_action_destroy(head
, bind
);
598 int tcf_action_copy_stats(struct sk_buff
*skb
, struct tc_action
*a
,
603 struct tcf_act_hdr
*h
= a
->priv
;
608 /* compat_mode being true specifies a call that is supposed
609 * to add additional backward compatibility statistic TLVs.
612 if (a
->type
== TCA_OLD_COMPAT
)
613 err
= gnet_stats_start_copy_compat(skb
, 0,
614 TCA_STATS
, TCA_XSTATS
, &h
->tcf_lock
, &d
);
618 err
= gnet_stats_start_copy(skb
, TCA_ACT_STATS
,
624 if (a
->ops
!= NULL
&& a
->ops
->get_stats
!= NULL
)
625 if (a
->ops
->get_stats(skb
, a
) < 0)
628 if (gnet_stats_copy_basic(&d
, &h
->tcf_bstats
) < 0 ||
629 gnet_stats_copy_rate_est(&d
, &h
->tcf_bstats
,
630 &h
->tcf_rate_est
) < 0 ||
631 gnet_stats_copy_queue(&d
, &h
->tcf_qstats
) < 0)
634 if (gnet_stats_finish_copy(&d
) < 0)
644 tca_get_fill(struct sk_buff
*skb
, struct tc_action
*a
, u32 pid
, u32 seq
,
645 u16 flags
, int event
, int bind
, int ref
)
648 struct nlmsghdr
*nlh
;
649 unsigned char *b
= skb_tail_pointer(skb
);
652 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*t
), flags
);
655 t
->tca_family
= AF_UNSPEC
;
659 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
661 goto nla_put_failure
;
663 if (tcf_action_dump(skb
, a
, bind
, ref
) < 0)
664 goto nla_put_failure
;
666 nla_nest_end(skb
, nest
);
668 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
678 act_get_notify(struct net
*net
, u32 pid
, struct nlmsghdr
*n
,
679 struct tc_action
*a
, int event
)
683 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
686 if (tca_get_fill(skb
, a
, pid
, n
->nlmsg_seq
, 0, event
, 0, 0) <= 0) {
691 return rtnl_unicast(skb
, net
, pid
);
694 static struct tc_action
*
695 tcf_action_get_1(struct nlattr
*nla
, struct nlmsghdr
*n
, u32 pid
)
697 struct nlattr
*tb
[TCA_ACT_MAX
+ 1];
702 err
= nla_parse_nested(tb
, TCA_ACT_MAX
, nla
, NULL
);
707 if (tb
[TCA_ACT_INDEX
] == NULL
||
708 nla_len(tb
[TCA_ACT_INDEX
]) < sizeof(index
))
710 index
= nla_get_u32(tb
[TCA_ACT_INDEX
]);
713 a
= kzalloc(sizeof(struct tc_action
), GFP_KERNEL
);
718 a
->ops
= tc_lookup_action(tb
[TCA_ACT_KIND
]);
721 if (a
->ops
->lookup
== NULL
)
724 if (a
->ops
->lookup(a
, index
) == 0)
727 module_put(a
->ops
->owner
);
731 module_put(a
->ops
->owner
);
738 static void cleanup_a(struct tc_action
*act
)
742 for (a
= act
; a
; a
= act
) {
748 static struct tc_action
*create_a(int i
)
750 struct tc_action
*act
;
752 act
= kzalloc(sizeof(*act
), GFP_KERNEL
);
754 pr_debug("create_a: failed to alloc!\n");
761 static int tca_action_flush(struct net
*net
, struct nlattr
*nla
,
762 struct nlmsghdr
*n
, u32 pid
)
766 struct nlmsghdr
*nlh
;
768 struct netlink_callback dcb
;
770 struct nlattr
*tb
[TCA_ACT_MAX
+ 1];
772 struct tc_action
*a
= create_a(0);
776 pr_debug("tca_action_flush: couldnt create tc_action\n");
780 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
782 pr_debug("tca_action_flush: failed skb alloc\n");
787 b
= skb_tail_pointer(skb
);
789 err
= nla_parse_nested(tb
, TCA_ACT_MAX
, nla
, NULL
);
794 kind
= tb
[TCA_ACT_KIND
];
795 a
->ops
= tc_lookup_action(kind
);
799 nlh
= NLMSG_PUT(skb
, pid
, n
->nlmsg_seq
, RTM_DELACTION
, sizeof(*t
));
801 t
->tca_family
= AF_UNSPEC
;
805 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
807 goto nla_put_failure
;
809 err
= a
->ops
->walk(skb
, &dcb
, RTM_DELACTION
, a
);
811 goto nla_put_failure
;
815 nla_nest_end(skb
, nest
);
817 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
818 nlh
->nlmsg_flags
|= NLM_F_ROOT
;
819 module_put(a
->ops
->owner
);
821 err
= rtnetlink_send(skb
, net
, pid
, RTNLGRP_TC
,
822 n
->nlmsg_flags
& NLM_F_ECHO
);
830 module_put(a
->ops
->owner
);
839 tca_action_gd(struct net
*net
, struct nlattr
*nla
, struct nlmsghdr
*n
,
843 struct nlattr
*tb
[TCA_ACT_MAX_PRIO
+ 1];
844 struct tc_action
*head
= NULL
, *act
, *act_prev
= NULL
;
846 ret
= nla_parse_nested(tb
, TCA_ACT_MAX_PRIO
, nla
, NULL
);
850 if (event
== RTM_DELACTION
&& n
->nlmsg_flags
& NLM_F_ROOT
) {
852 return tca_action_flush(net
, tb
[1], n
, pid
);
857 for (i
= 1; i
<= TCA_ACT_MAX_PRIO
&& tb
[i
]; i
++) {
858 act
= tcf_action_get_1(tb
[i
], n
, pid
);
868 act_prev
->next
= act
;
872 if (event
== RTM_GETACTION
)
873 ret
= act_get_notify(net
, pid
, n
, head
, event
);
877 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
883 if (tca_get_fill(skb
, head
, pid
, n
->nlmsg_seq
, 0, event
,
890 /* now do the delete */
891 tcf_action_destroy(head
, 0);
892 ret
= rtnetlink_send(skb
, net
, pid
, RTNLGRP_TC
,
893 n
->nlmsg_flags
& NLM_F_ECHO
);
903 static int tcf_add_notify(struct net
*net
, struct tc_action
*a
,
904 u32 pid
, u32 seq
, int event
, u16 flags
)
907 struct nlmsghdr
*nlh
;
913 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
917 b
= skb_tail_pointer(skb
);
919 nlh
= NLMSG_NEW(skb
, pid
, seq
, event
, sizeof(*t
), flags
);
921 t
->tca_family
= AF_UNSPEC
;
925 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
927 goto nla_put_failure
;
929 if (tcf_action_dump(skb
, a
, 0, 0) < 0)
930 goto nla_put_failure
;
932 nla_nest_end(skb
, nest
);
934 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
935 NETLINK_CB(skb
).dst_group
= RTNLGRP_TC
;
937 err
= rtnetlink_send(skb
, net
, pid
, RTNLGRP_TC
, flags
& NLM_F_ECHO
);
950 tcf_action_add(struct net
*net
, struct nlattr
*nla
, struct nlmsghdr
*n
,
954 struct tc_action
*act
;
956 u32 seq
= n
->nlmsg_seq
;
958 act
= tcf_action_init(nla
, NULL
, NULL
, ovr
, 0);
966 /* dump then free all the actions after update; inserted policy
969 ret
= tcf_add_notify(net
, act
, pid
, seq
, RTM_NEWACTION
, n
->nlmsg_flags
);
970 for (a
= act
; a
; a
= act
) {
978 static int tc_ctl_action(struct sk_buff
*skb
, struct nlmsghdr
*n
, void *arg
)
980 struct net
*net
= sock_net(skb
->sk
);
981 struct nlattr
*tca
[TCA_ACT_MAX
+ 1];
982 u32 pid
= skb
? NETLINK_CB(skb
).pid
: 0;
983 int ret
= 0, ovr
= 0;
985 ret
= nlmsg_parse(n
, sizeof(struct tcamsg
), tca
, TCA_ACT_MAX
, NULL
);
989 if (tca
[TCA_ACT_TAB
] == NULL
) {
990 pr_notice("tc_ctl_action: received NO action attribs\n");
994 /* n->nlmsg_flags & NLM_F_CREATE */
995 switch (n
->nlmsg_type
) {
997 /* we are going to assume all other flags
998 * imply create only if it doesn't exist
999 * Note that CREATE | EXCL implies that
1000 * but since we want avoid ambiguity (eg when flags
1001 * is zero) then just set this
1003 if (n
->nlmsg_flags
& NLM_F_REPLACE
)
1006 ret
= tcf_action_add(net
, tca
[TCA_ACT_TAB
], n
, pid
, ovr
);
1011 ret
= tca_action_gd(net
, tca
[TCA_ACT_TAB
], n
,
1012 pid
, RTM_DELACTION
);
1015 ret
= tca_action_gd(net
, tca
[TCA_ACT_TAB
], n
,
1016 pid
, RTM_GETACTION
);
1025 static struct nlattr
*
1026 find_dump_kind(const struct nlmsghdr
*n
)
1028 struct nlattr
*tb1
, *tb2
[TCA_ACT_MAX
+ 1];
1029 struct nlattr
*tb
[TCA_ACT_MAX_PRIO
+ 1];
1030 struct nlattr
*nla
[TCAA_MAX
+ 1];
1031 struct nlattr
*kind
;
1033 if (nlmsg_parse(n
, sizeof(struct tcamsg
), nla
, TCAA_MAX
, NULL
) < 0)
1035 tb1
= nla
[TCA_ACT_TAB
];
1039 if (nla_parse(tb
, TCA_ACT_MAX_PRIO
, nla_data(tb1
),
1040 NLMSG_ALIGN(nla_len(tb1
)), NULL
) < 0)
1045 if (nla_parse(tb2
, TCA_ACT_MAX
, nla_data(tb
[1]),
1046 nla_len(tb
[1]), NULL
) < 0)
1048 kind
= tb2
[TCA_ACT_KIND
];
1054 tc_dump_action(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1056 struct nlmsghdr
*nlh
;
1057 unsigned char *b
= skb_tail_pointer(skb
);
1058 struct nlattr
*nest
;
1059 struct tc_action_ops
*a_o
;
1062 struct tcamsg
*t
= (struct tcamsg
*) NLMSG_DATA(cb
->nlh
);
1063 struct nlattr
*kind
= find_dump_kind(cb
->nlh
);
1066 pr_info("tc_dump_action: action bad kind\n");
1070 a_o
= tc_lookup_action(kind
);
1074 memset(&a
, 0, sizeof(struct tc_action
));
1077 if (a_o
->walk
== NULL
) {
1078 WARN(1, "tc_dump_action: %s !capable of dumping table\n",
1080 goto nla_put_failure
;
1083 nlh
= NLMSG_PUT(skb
, NETLINK_CB(cb
->skb
).pid
, cb
->nlh
->nlmsg_seq
,
1084 cb
->nlh
->nlmsg_type
, sizeof(*t
));
1085 t
= NLMSG_DATA(nlh
);
1086 t
->tca_family
= AF_UNSPEC
;
1090 nest
= nla_nest_start(skb
, TCA_ACT_TAB
);
1092 goto nla_put_failure
;
1094 ret
= a_o
->walk(skb
, cb
, RTM_GETACTION
, &a
);
1096 goto nla_put_failure
;
1099 nla_nest_end(skb
, nest
);
1102 nla_nest_cancel(skb
, nest
);
1104 nlh
->nlmsg_len
= skb_tail_pointer(skb
) - b
;
1105 if (NETLINK_CB(cb
->skb
).pid
&& ret
)
1106 nlh
->nlmsg_flags
|= NLM_F_MULTI
;
1107 module_put(a_o
->owner
);
1112 module_put(a_o
->owner
);
1117 static int __init
tc_action_init(void)
1119 rtnl_register(PF_UNSPEC
, RTM_NEWACTION
, tc_ctl_action
, NULL
, NULL
);
1120 rtnl_register(PF_UNSPEC
, RTM_DELACTION
, tc_ctl_action
, NULL
, NULL
);
1121 rtnl_register(PF_UNSPEC
, RTM_GETACTION
, tc_ctl_action
, tc_dump_action
,
1127 subsys_initcall(tc_action_init
);