2 * net/tipc/bearer.c: TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2014, Ericsson AB
5 * Copyright (c) 2004-2006, 2010-2013, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
43 #define MAX_ADDR_STR 60
45 static struct tipc_media
* const media_info_array
[] = {
47 #ifdef CONFIG_TIPC_MEDIA_IB
53 static const struct nla_policy
54 tipc_nl_bearer_policy
[TIPC_NLA_BEARER_MAX
+ 1] = {
55 [TIPC_NLA_BEARER_UNSPEC
] = { .type
= NLA_UNSPEC
},
56 [TIPC_NLA_BEARER_NAME
] = {
58 .len
= TIPC_MAX_BEARER_NAME
60 [TIPC_NLA_BEARER_PROP
] = { .type
= NLA_NESTED
},
61 [TIPC_NLA_BEARER_DOMAIN
] = { .type
= NLA_U32
}
64 static const struct nla_policy tipc_nl_media_policy
[TIPC_NLA_MEDIA_MAX
+ 1] = {
65 [TIPC_NLA_MEDIA_UNSPEC
] = { .type
= NLA_UNSPEC
},
66 [TIPC_NLA_MEDIA_NAME
] = { .type
= NLA_STRING
},
67 [TIPC_NLA_MEDIA_PROP
] = { .type
= NLA_NESTED
}
70 struct tipc_bearer __rcu
*bearer_list
[MAX_BEARERS
+ 1];
72 static void bearer_disable(struct tipc_bearer
*b_ptr
, bool shutting_down
);
75 * tipc_media_find - locates specified media object by name
77 struct tipc_media
*tipc_media_find(const char *name
)
81 for (i
= 0; media_info_array
[i
] != NULL
; i
++) {
82 if (!strcmp(media_info_array
[i
]->name
, name
))
85 return media_info_array
[i
];
89 * media_find_id - locates specified media object by type identifier
91 static struct tipc_media
*media_find_id(u8 type
)
95 for (i
= 0; media_info_array
[i
] != NULL
; i
++) {
96 if (media_info_array
[i
]->type_id
== type
)
99 return media_info_array
[i
];
103 * tipc_media_addr_printf - record media address in print buffer
105 void tipc_media_addr_printf(char *buf
, int len
, struct tipc_media_addr
*a
)
107 char addr_str
[MAX_ADDR_STR
];
108 struct tipc_media
*m_ptr
;
111 m_ptr
= media_find_id(a
->media_id
);
113 if (m_ptr
&& !m_ptr
->addr2str(a
, addr_str
, sizeof(addr_str
)))
114 ret
= tipc_snprintf(buf
, len
, "%s(%s)", m_ptr
->name
, addr_str
);
118 ret
= tipc_snprintf(buf
, len
, "UNKNOWN(%u)", a
->media_id
);
119 for (i
= 0; i
< sizeof(a
->value
); i
++)
120 ret
+= tipc_snprintf(buf
- ret
, len
+ ret
,
121 "-%02x", a
->value
[i
]);
126 * tipc_media_get_names - record names of registered media in buffer
128 struct sk_buff
*tipc_media_get_names(void)
133 buf
= tipc_cfg_reply_alloc(MAX_MEDIA
* TLV_SPACE(TIPC_MAX_MEDIA_NAME
));
137 for (i
= 0; media_info_array
[i
] != NULL
; i
++) {
138 tipc_cfg_append_tlv(buf
, TIPC_TLV_MEDIA_NAME
,
139 media_info_array
[i
]->name
,
140 strlen(media_info_array
[i
]->name
) + 1);
146 * bearer_name_validate - validate & (optionally) deconstruct bearer name
147 * @name: ptr to bearer name string
148 * @name_parts: ptr to area for bearer name components (or NULL if not needed)
150 * Returns 1 if bearer name is valid, otherwise 0.
152 static int bearer_name_validate(const char *name
,
153 struct tipc_bearer_names
*name_parts
)
155 char name_copy
[TIPC_MAX_BEARER_NAME
];
161 /* copy bearer name & ensure length is OK */
162 name_copy
[TIPC_MAX_BEARER_NAME
- 1] = 0;
163 /* need above in case non-Posix strncpy() doesn't pad with nulls */
164 strncpy(name_copy
, name
, TIPC_MAX_BEARER_NAME
);
165 if (name_copy
[TIPC_MAX_BEARER_NAME
- 1] != 0)
168 /* ensure all component parts of bearer name are present */
169 media_name
= name_copy
;
170 if_name
= strchr(media_name
, ':');
174 media_len
= if_name
- media_name
;
175 if_len
= strlen(if_name
) + 1;
177 /* validate component parts of bearer name */
178 if ((media_len
<= 1) || (media_len
> TIPC_MAX_MEDIA_NAME
) ||
179 (if_len
<= 1) || (if_len
> TIPC_MAX_IF_NAME
))
182 /* return bearer name components, if necessary */
184 strcpy(name_parts
->media_name
, media_name
);
185 strcpy(name_parts
->if_name
, if_name
);
191 * tipc_bearer_find - locates bearer object with matching bearer name
193 struct tipc_bearer
*tipc_bearer_find(const char *name
)
195 struct tipc_bearer
*b_ptr
;
198 for (i
= 0; i
< MAX_BEARERS
; i
++) {
199 b_ptr
= rtnl_dereference(bearer_list
[i
]);
200 if (b_ptr
&& (!strcmp(b_ptr
->name
, name
)))
207 * tipc_bearer_get_names - record names of bearers in buffer
209 struct sk_buff
*tipc_bearer_get_names(void)
212 struct tipc_bearer
*b
;
215 buf
= tipc_cfg_reply_alloc(MAX_BEARERS
* TLV_SPACE(TIPC_MAX_BEARER_NAME
));
219 for (i
= 0; media_info_array
[i
] != NULL
; i
++) {
220 for (j
= 0; j
< MAX_BEARERS
; j
++) {
221 b
= rtnl_dereference(bearer_list
[j
]);
224 if (b
->media
== media_info_array
[i
]) {
225 tipc_cfg_append_tlv(buf
, TIPC_TLV_BEARER_NAME
,
227 strlen(b
->name
) + 1);
234 void tipc_bearer_add_dest(u32 bearer_id
, u32 dest
)
236 struct tipc_bearer
*b_ptr
;
239 b_ptr
= rcu_dereference_rtnl(bearer_list
[bearer_id
]);
241 tipc_bcbearer_sort(&b_ptr
->nodes
, dest
, true);
242 tipc_disc_add_dest(b_ptr
->link_req
);
247 void tipc_bearer_remove_dest(u32 bearer_id
, u32 dest
)
249 struct tipc_bearer
*b_ptr
;
252 b_ptr
= rcu_dereference_rtnl(bearer_list
[bearer_id
]);
254 tipc_bcbearer_sort(&b_ptr
->nodes
, dest
, false);
255 tipc_disc_remove_dest(b_ptr
->link_req
);
261 * tipc_enable_bearer - enable bearer with the given name
263 int tipc_enable_bearer(const char *name
, u32 disc_domain
, u32 priority
)
265 struct tipc_bearer
*b_ptr
;
266 struct tipc_media
*m_ptr
;
267 struct tipc_bearer_names b_names
;
268 char addr_string
[16];
274 if (!tipc_own_addr
) {
275 pr_warn("Bearer <%s> rejected, not supported in standalone mode\n",
279 if (!bearer_name_validate(name
, &b_names
)) {
280 pr_warn("Bearer <%s> rejected, illegal name\n", name
);
283 if (tipc_addr_domain_valid(disc_domain
) &&
284 (disc_domain
!= tipc_own_addr
)) {
285 if (tipc_in_scope(disc_domain
, tipc_own_addr
)) {
286 disc_domain
= tipc_own_addr
& TIPC_CLUSTER_MASK
;
287 res
= 0; /* accept any node in own cluster */
288 } else if (in_own_cluster_exact(disc_domain
))
289 res
= 0; /* accept specified node in own cluster */
292 pr_warn("Bearer <%s> rejected, illegal discovery domain\n",
296 if ((priority
> TIPC_MAX_LINK_PRI
) &&
297 (priority
!= TIPC_MEDIA_LINK_PRI
)) {
298 pr_warn("Bearer <%s> rejected, illegal priority\n", name
);
302 m_ptr
= tipc_media_find(b_names
.media_name
);
304 pr_warn("Bearer <%s> rejected, media <%s> not registered\n",
305 name
, b_names
.media_name
);
309 if (priority
== TIPC_MEDIA_LINK_PRI
)
310 priority
= m_ptr
->priority
;
313 bearer_id
= MAX_BEARERS
;
315 for (i
= MAX_BEARERS
; i
-- != 0; ) {
316 b_ptr
= rtnl_dereference(bearer_list
[i
]);
321 if (!strcmp(name
, b_ptr
->name
)) {
322 pr_warn("Bearer <%s> rejected, already enabled\n",
326 if ((b_ptr
->priority
== priority
) &&
327 (++with_this_prio
> 2)) {
328 if (priority
-- == 0) {
329 pr_warn("Bearer <%s> rejected, duplicate priority\n",
333 pr_warn("Bearer <%s> priority adjustment required %u->%u\n",
334 name
, priority
+ 1, priority
);
338 if (bearer_id
>= MAX_BEARERS
) {
339 pr_warn("Bearer <%s> rejected, bearer limit reached (%u)\n",
344 b_ptr
= kzalloc(sizeof(*b_ptr
), GFP_ATOMIC
);
348 strcpy(b_ptr
->name
, name
);
349 b_ptr
->media
= m_ptr
;
350 res
= m_ptr
->enable_media(b_ptr
);
352 pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
357 b_ptr
->identity
= bearer_id
;
358 b_ptr
->tolerance
= m_ptr
->tolerance
;
359 b_ptr
->window
= m_ptr
->window
;
360 b_ptr
->domain
= disc_domain
;
361 b_ptr
->net_plane
= bearer_id
+ 'A';
362 b_ptr
->priority
= priority
;
364 res
= tipc_disc_create(b_ptr
, &b_ptr
->bcast_addr
);
366 bearer_disable(b_ptr
, false);
367 pr_warn("Bearer <%s> rejected, discovery object creation failed\n",
372 rcu_assign_pointer(bearer_list
[bearer_id
], b_ptr
);
374 pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
376 tipc_addr_string_fill(addr_string
, disc_domain
), priority
);
381 * tipc_reset_bearer - Reset all links established over this bearer
383 static int tipc_reset_bearer(struct tipc_bearer
*b_ptr
)
385 pr_info("Resetting bearer <%s>\n", b_ptr
->name
);
386 tipc_link_reset_list(b_ptr
->identity
);
387 tipc_disc_reset(b_ptr
);
394 * Note: This routine assumes caller holds RTNL lock.
396 static void bearer_disable(struct tipc_bearer
*b_ptr
, bool shutting_down
)
400 pr_info("Disabling bearer <%s>\n", b_ptr
->name
);
401 b_ptr
->media
->disable_media(b_ptr
);
403 tipc_link_delete_list(b_ptr
->identity
, shutting_down
);
405 tipc_disc_delete(b_ptr
->link_req
);
407 for (i
= 0; i
< MAX_BEARERS
; i
++) {
408 if (b_ptr
== rtnl_dereference(bearer_list
[i
])) {
409 RCU_INIT_POINTER(bearer_list
[i
], NULL
);
413 kfree_rcu(b_ptr
, rcu
);
416 int tipc_disable_bearer(const char *name
)
418 struct tipc_bearer
*b_ptr
;
421 b_ptr
= tipc_bearer_find(name
);
423 pr_warn("Attempt to disable unknown bearer <%s>\n", name
);
426 bearer_disable(b_ptr
, false);
432 int tipc_enable_l2_media(struct tipc_bearer
*b
)
434 struct net_device
*dev
;
435 char *driver_name
= strchr((const char *)b
->name
, ':') + 1;
437 /* Find device with specified name */
438 dev
= dev_get_by_name(&init_net
, driver_name
);
442 /* Associate TIPC bearer with L2 bearer */
443 rcu_assign_pointer(b
->media_ptr
, dev
);
444 memset(&b
->bcast_addr
, 0, sizeof(b
->bcast_addr
));
445 memcpy(b
->bcast_addr
.value
, dev
->broadcast
, b
->media
->hwaddr_len
);
446 b
->bcast_addr
.media_id
= b
->media
->type_id
;
447 b
->bcast_addr
.broadcast
= 1;
449 b
->media
->raw2addr(b
, &b
->addr
, (char *)dev
->dev_addr
);
450 rcu_assign_pointer(dev
->tipc_ptr
, b
);
454 /* tipc_disable_l2_media - detach TIPC bearer from an L2 interface
456 * Mark L2 bearer as inactive so that incoming buffers are thrown away,
457 * then get worker thread to complete bearer cleanup. (Can't do cleanup
458 * here because cleanup code needs to sleep and caller holds spinlocks.)
460 void tipc_disable_l2_media(struct tipc_bearer
*b
)
462 struct net_device
*dev
;
464 dev
= (struct net_device
*)rtnl_dereference(b
->media_ptr
);
465 RCU_INIT_POINTER(b
->media_ptr
, NULL
);
466 RCU_INIT_POINTER(dev
->tipc_ptr
, NULL
);
472 * tipc_l2_send_msg - send a TIPC packet out over an L2 interface
473 * @buf: the packet to be sent
474 * @b_ptr: the bearer through which the packet is to be sent
475 * @dest: peer destination address
477 int tipc_l2_send_msg(struct sk_buff
*buf
, struct tipc_bearer
*b
,
478 struct tipc_media_addr
*dest
)
480 struct sk_buff
*clone
;
481 struct net_device
*dev
;
484 dev
= (struct net_device
*)rcu_dereference_rtnl(b
->media_ptr
);
488 clone
= skb_clone(buf
, GFP_ATOMIC
);
492 delta
= dev
->hard_header_len
- skb_headroom(buf
);
494 pskb_expand_head(clone
, SKB_DATA_ALIGN(delta
), 0, GFP_ATOMIC
)) {
499 skb_reset_network_header(clone
);
501 clone
->protocol
= htons(ETH_P_TIPC
);
502 dev_hard_header(clone
, dev
, ETH_P_TIPC
, dest
->value
,
503 dev
->dev_addr
, clone
->len
);
504 dev_queue_xmit(clone
);
508 /* tipc_bearer_send- sends buffer to destination over bearer
511 * The media send routine must not alter the buffer being passed in
512 * as it may be needed for later retransmission!
514 void tipc_bearer_send(u32 bearer_id
, struct sk_buff
*buf
,
515 struct tipc_media_addr
*dest
)
517 struct tipc_bearer
*b_ptr
;
520 b_ptr
= rcu_dereference_rtnl(bearer_list
[bearer_id
]);
522 b_ptr
->media
->send_msg(buf
, b_ptr
, dest
);
527 * tipc_l2_rcv_msg - handle incoming TIPC message from an interface
528 * @buf: the received packet
529 * @dev: the net device that the packet was received on
530 * @pt: the packet_type structure which was used to register this handler
531 * @orig_dev: the original receive net device in case the device is a bond
533 * Accept only packets explicitly sent to this node, or broadcast packets;
534 * ignores packets sent using interface multicast, and traffic sent to other
535 * nodes (which can happen if interface is running in promiscuous mode).
537 static int tipc_l2_rcv_msg(struct sk_buff
*buf
, struct net_device
*dev
,
538 struct packet_type
*pt
, struct net_device
*orig_dev
)
540 struct tipc_bearer
*b_ptr
;
542 if (!net_eq(dev_net(dev
), &init_net
)) {
548 b_ptr
= rcu_dereference_rtnl(dev
->tipc_ptr
);
550 if (likely(buf
->pkt_type
<= PACKET_BROADCAST
)) {
552 tipc_rcv(buf
, b_ptr
);
554 return NET_RX_SUCCESS
;
564 * tipc_l2_device_event - handle device events from network device
565 * @nb: the context of the notification
566 * @evt: the type of event
567 * @ptr: the net device that the event was on
569 * This function is called by the Ethernet driver in case of link
572 static int tipc_l2_device_event(struct notifier_block
*nb
, unsigned long evt
,
575 struct tipc_bearer
*b_ptr
;
576 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
578 if (!net_eq(dev_net(dev
), &init_net
))
581 b_ptr
= rtnl_dereference(dev
->tipc_ptr
);
585 b_ptr
->mtu
= dev
->mtu
;
589 if (netif_carrier_ok(dev
))
592 case NETDEV_CHANGEMTU
:
593 tipc_reset_bearer(b_ptr
);
595 case NETDEV_CHANGEADDR
:
596 b_ptr
->media
->raw2addr(b_ptr
, &b_ptr
->addr
,
597 (char *)dev
->dev_addr
);
598 tipc_reset_bearer(b_ptr
);
600 case NETDEV_UNREGISTER
:
601 case NETDEV_CHANGENAME
:
602 bearer_disable(b_ptr
, false);
608 static struct packet_type tipc_packet_type __read_mostly
= {
609 .type
= htons(ETH_P_TIPC
),
610 .func
= tipc_l2_rcv_msg
,
613 static struct notifier_block notifier
= {
614 .notifier_call
= tipc_l2_device_event
,
618 int tipc_bearer_setup(void)
622 err
= register_netdevice_notifier(¬ifier
);
625 dev_add_pack(&tipc_packet_type
);
629 void tipc_bearer_cleanup(void)
631 unregister_netdevice_notifier(¬ifier
);
632 dev_remove_pack(&tipc_packet_type
);
635 void tipc_bearer_stop(void)
637 struct tipc_bearer
*b_ptr
;
640 for (i
= 0; i
< MAX_BEARERS
; i
++) {
641 b_ptr
= rtnl_dereference(bearer_list
[i
]);
643 bearer_disable(b_ptr
, true);
644 bearer_list
[i
] = NULL
;
649 /* Caller should hold rtnl_lock to protect the bearer */
650 int __tipc_nl_add_bearer(struct tipc_nl_msg
*msg
, struct tipc_bearer
*bearer
)
653 struct nlattr
*attrs
;
656 hdr
= genlmsg_put(msg
->skb
, msg
->portid
, msg
->seq
, &tipc_genl_v2_family
,
657 NLM_F_MULTI
, TIPC_NL_BEARER_GET
);
661 attrs
= nla_nest_start(msg
->skb
, TIPC_NLA_BEARER
);
665 if (nla_put_string(msg
->skb
, TIPC_NLA_BEARER_NAME
, bearer
->name
))
668 prop
= nla_nest_start(msg
->skb
, TIPC_NLA_BEARER_PROP
);
671 if (nla_put_u32(msg
->skb
, TIPC_NLA_PROP_PRIO
, bearer
->priority
))
673 if (nla_put_u32(msg
->skb
, TIPC_NLA_PROP_TOL
, bearer
->tolerance
))
675 if (nla_put_u32(msg
->skb
, TIPC_NLA_PROP_WIN
, bearer
->window
))
678 nla_nest_end(msg
->skb
, prop
);
679 nla_nest_end(msg
->skb
, attrs
);
680 genlmsg_end(msg
->skb
, hdr
);
685 nla_nest_cancel(msg
->skb
, prop
);
687 nla_nest_cancel(msg
->skb
, attrs
);
689 genlmsg_cancel(msg
->skb
, hdr
);
694 int tipc_nl_bearer_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
698 struct tipc_bearer
*bearer
;
699 struct tipc_nl_msg msg
;
701 if (i
== MAX_BEARERS
)
705 msg
.portid
= NETLINK_CB(cb
->skb
).portid
;
706 msg
.seq
= cb
->nlh
->nlmsg_seq
;
709 for (i
= 0; i
< MAX_BEARERS
; i
++) {
710 bearer
= rtnl_dereference(bearer_list
[i
]);
714 err
= __tipc_nl_add_bearer(&msg
, bearer
);
724 int tipc_nl_bearer_get(struct sk_buff
*skb
, struct genl_info
*info
)
729 struct tipc_bearer
*bearer
;
730 struct tipc_nl_msg msg
;
731 struct nlattr
*attrs
[TIPC_NLA_BEARER_MAX
+ 1];
733 if (!info
->attrs
[TIPC_NLA_BEARER
])
736 err
= nla_parse_nested(attrs
, TIPC_NLA_BEARER_MAX
,
737 info
->attrs
[TIPC_NLA_BEARER
],
738 tipc_nl_bearer_policy
);
742 if (!attrs
[TIPC_NLA_BEARER_NAME
])
744 name
= nla_data(attrs
[TIPC_NLA_BEARER_NAME
]);
746 rep
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
751 msg
.portid
= info
->snd_portid
;
752 msg
.seq
= info
->snd_seq
;
755 bearer
= tipc_bearer_find(name
);
761 err
= __tipc_nl_add_bearer(&msg
, bearer
);
766 return genlmsg_reply(rep
, info
);
774 int tipc_nl_bearer_disable(struct sk_buff
*skb
, struct genl_info
*info
)
778 struct tipc_bearer
*bearer
;
779 struct nlattr
*attrs
[TIPC_NLA_BEARER_MAX
+ 1];
781 if (!info
->attrs
[TIPC_NLA_BEARER
])
784 err
= nla_parse_nested(attrs
, TIPC_NLA_BEARER_MAX
,
785 info
->attrs
[TIPC_NLA_BEARER
],
786 tipc_nl_bearer_policy
);
790 if (!attrs
[TIPC_NLA_BEARER_NAME
])
793 name
= nla_data(attrs
[TIPC_NLA_BEARER_NAME
]);
796 bearer
= tipc_bearer_find(name
);
802 bearer_disable(bearer
, false);
808 int tipc_nl_bearer_enable(struct sk_buff
*skb
, struct genl_info
*info
)
812 struct nlattr
*attrs
[TIPC_NLA_BEARER_MAX
+ 1];
816 prio
= TIPC_MEDIA_LINK_PRI
;
817 domain
= tipc_own_addr
& TIPC_CLUSTER_MASK
;
819 if (!info
->attrs
[TIPC_NLA_BEARER
])
822 err
= nla_parse_nested(attrs
, TIPC_NLA_BEARER_MAX
,
823 info
->attrs
[TIPC_NLA_BEARER
],
824 tipc_nl_bearer_policy
);
828 if (!attrs
[TIPC_NLA_BEARER_NAME
])
831 bearer
= nla_data(attrs
[TIPC_NLA_BEARER_NAME
]);
833 if (attrs
[TIPC_NLA_BEARER_DOMAIN
])
834 domain
= nla_get_u32(attrs
[TIPC_NLA_BEARER_DOMAIN
]);
836 if (attrs
[TIPC_NLA_BEARER_PROP
]) {
837 struct nlattr
*props
[TIPC_NLA_PROP_MAX
+ 1];
839 err
= tipc_nl_parse_link_prop(attrs
[TIPC_NLA_BEARER_PROP
],
844 if (props
[TIPC_NLA_PROP_PRIO
])
845 prio
= nla_get_u32(props
[TIPC_NLA_PROP_PRIO
]);
849 err
= tipc_enable_bearer(bearer
, domain
, prio
);
859 int tipc_nl_bearer_set(struct sk_buff
*skb
, struct genl_info
*info
)
863 struct tipc_bearer
*b
;
864 struct nlattr
*attrs
[TIPC_NLA_BEARER_MAX
+ 1];
866 if (!info
->attrs
[TIPC_NLA_BEARER
])
869 err
= nla_parse_nested(attrs
, TIPC_NLA_BEARER_MAX
,
870 info
->attrs
[TIPC_NLA_BEARER
],
871 tipc_nl_bearer_policy
);
875 if (!attrs
[TIPC_NLA_BEARER_NAME
])
877 name
= nla_data(attrs
[TIPC_NLA_BEARER_NAME
]);
880 b
= tipc_bearer_find(name
);
886 if (attrs
[TIPC_NLA_BEARER_PROP
]) {
887 struct nlattr
*props
[TIPC_NLA_PROP_MAX
+ 1];
889 err
= tipc_nl_parse_link_prop(attrs
[TIPC_NLA_BEARER_PROP
],
896 if (props
[TIPC_NLA_PROP_TOL
])
897 b
->tolerance
= nla_get_u32(props
[TIPC_NLA_PROP_TOL
]);
898 if (props
[TIPC_NLA_PROP_PRIO
])
899 b
->priority
= nla_get_u32(props
[TIPC_NLA_PROP_PRIO
]);
900 if (props
[TIPC_NLA_PROP_WIN
])
901 b
->window
= nla_get_u32(props
[TIPC_NLA_PROP_WIN
]);
908 int __tipc_nl_add_media(struct tipc_nl_msg
*msg
, struct tipc_media
*media
)
911 struct nlattr
*attrs
;
914 hdr
= genlmsg_put(msg
->skb
, msg
->portid
, msg
->seq
, &tipc_genl_v2_family
,
915 NLM_F_MULTI
, TIPC_NL_MEDIA_GET
);
919 attrs
= nla_nest_start(msg
->skb
, TIPC_NLA_MEDIA
);
923 if (nla_put_string(msg
->skb
, TIPC_NLA_MEDIA_NAME
, media
->name
))
926 prop
= nla_nest_start(msg
->skb
, TIPC_NLA_MEDIA_PROP
);
929 if (nla_put_u32(msg
->skb
, TIPC_NLA_PROP_PRIO
, media
->priority
))
931 if (nla_put_u32(msg
->skb
, TIPC_NLA_PROP_TOL
, media
->tolerance
))
933 if (nla_put_u32(msg
->skb
, TIPC_NLA_PROP_WIN
, media
->window
))
936 nla_nest_end(msg
->skb
, prop
);
937 nla_nest_end(msg
->skb
, attrs
);
938 genlmsg_end(msg
->skb
, hdr
);
943 nla_nest_cancel(msg
->skb
, prop
);
945 nla_nest_cancel(msg
->skb
, attrs
);
947 genlmsg_cancel(msg
->skb
, hdr
);
952 int tipc_nl_media_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
)
956 struct tipc_nl_msg msg
;
962 msg
.portid
= NETLINK_CB(cb
->skb
).portid
;
963 msg
.seq
= cb
->nlh
->nlmsg_seq
;
966 for (; media_info_array
[i
] != NULL
; i
++) {
967 err
= __tipc_nl_add_media(&msg
, media_info_array
[i
]);
977 int tipc_nl_media_get(struct sk_buff
*skb
, struct genl_info
*info
)
981 struct tipc_nl_msg msg
;
982 struct tipc_media
*media
;
984 struct nlattr
*attrs
[TIPC_NLA_BEARER_MAX
+ 1];
986 if (!info
->attrs
[TIPC_NLA_MEDIA
])
989 err
= nla_parse_nested(attrs
, TIPC_NLA_MEDIA_MAX
,
990 info
->attrs
[TIPC_NLA_MEDIA
],
991 tipc_nl_media_policy
);
995 if (!attrs
[TIPC_NLA_MEDIA_NAME
])
997 name
= nla_data(attrs
[TIPC_NLA_MEDIA_NAME
]);
999 rep
= nlmsg_new(NLMSG_GOODSIZE
, GFP_KERNEL
);
1004 msg
.portid
= info
->snd_portid
;
1005 msg
.seq
= info
->snd_seq
;
1008 media
= tipc_media_find(name
);
1014 err
= __tipc_nl_add_media(&msg
, media
);
1019 return genlmsg_reply(rep
, info
);