1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright © 2016 BISDN GmbH. All rights reserved.
6 #include <netinet/in.h>
7 #include <linux/if_bridge.h>
10 #include "alloc-util.h"
11 #include "conf-parser.h"
12 #include "netlink-util.h"
13 #include "networkd-brvlan.h"
14 #include "networkd-link.h"
15 #include "networkd-manager.h"
16 #include "networkd-network.h"
17 #include "parse-util.h"
18 #include "vlan-util.h"
20 static bool is_bit_set(unsigned bit
, uint32_t scope
) {
21 assert(bit
< sizeof(scope
)*8);
22 return scope
& (1 << bit
);
25 static inline void set_bit(unsigned nr
, uint32_t *addr
) {
26 if (nr
< BRIDGE_VLAN_BITMAP_MAX
)
27 addr
[nr
/ 32] |= (((uint32_t) 1) << (nr
% 32));
30 static int find_next_bit(int i
, uint32_t x
) {
38 return BUILTIN_FFS_U32(x
);
40 /* mask off prior finds to get next */
41 j
= __builtin_ffs(x
>> i
);
45 static int append_vlan_info_data(Link
*const link
, sd_netlink_message
*req
, uint16_t pvid
, const uint32_t *br_vid_bitmap
, const uint32_t *br_untagged_bitmap
) {
46 struct bridge_vlan_info br_vlan
;
47 int i
, j
, k
, r
, done
, cnt
;
49 bool untagged
= false;
53 assert(br_vid_bitmap
);
54 assert(br_untagged_bitmap
);
58 begin
= end
= UINT16_MAX
;
59 for (k
= 0; k
< BRIDGE_VLAN_BITMAP_LEN
; k
++) {
61 uint32_t vid_map
= br_vid_bitmap
[k
];
62 uint32_t untagged_map
= br_untagged_bitmap
[k
];
68 j
= find_next_bit(i
, vid_map
);
70 /* first hit of any bit */
71 if (begin
== UINT16_MAX
&& end
== UINT16_MAX
) {
72 begin
= end
= j
- 1 + base_bit
;
73 untagged
= is_bit_set(j
- 1, untagged_map
);
77 /* this bit is a continuation of prior bits */
78 if (j
- 2 + base_bit
== end
&& untagged
== is_bit_set(j
- 1, untagged_map
) && (uint16_t)j
- 1 + base_bit
!= pvid
&& (uint16_t)begin
!= pvid
) {
85 if (begin
!= UINT16_MAX
) {
87 if (done
&& k
< BRIDGE_VLAN_BITMAP_LEN
- 1)
92 br_vlan
.flags
|= BRIDGE_VLAN_INFO_UNTAGGED
;
98 br_vlan
.flags
|= BRIDGE_VLAN_INFO_PVID
;
100 r
= sd_netlink_message_append_data(req
, IFLA_BRIDGE_VLAN_INFO
, &br_vlan
, sizeof(br_vlan
));
102 return log_link_error_errno(link
, r
, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m");
105 br_vlan
.flags
|= BRIDGE_VLAN_INFO_RANGE_BEGIN
;
107 r
= sd_netlink_message_append_data(req
, IFLA_BRIDGE_VLAN_INFO
, &br_vlan
, sizeof(br_vlan
));
109 return log_link_error_errno(link
, r
, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m");
112 br_vlan
.flags
&= ~BRIDGE_VLAN_INFO_RANGE_BEGIN
;
113 br_vlan
.flags
|= BRIDGE_VLAN_INFO_RANGE_END
;
115 r
= sd_netlink_message_append_data(req
, IFLA_BRIDGE_VLAN_INFO
, &br_vlan
, sizeof(br_vlan
));
117 return log_link_error_errno(link
, r
, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m");
124 begin
= end
= j
- 1 + base_bit
;
125 untagged
= is_bit_set(j
- 1, untagged_map
);
138 static int set_brvlan_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
, void *userdata
) {
139 Link
*link
= userdata
;
144 r
= sd_netlink_message_get_errno(m
);
145 if (r
< 0 && r
!= -EEXIST
)
146 log_link_error_errno(link
, r
, "Could not add VLAN to bridge port: %m");
151 int br_vlan_configure(Link
*link
, uint16_t pvid
, uint32_t *br_vid_bitmap
, uint32_t *br_untagged_bitmap
) {
152 _cleanup_(sd_netlink_message_unrefp
) sd_netlink_message
*req
= NULL
;
158 assert(link
->manager
);
159 assert(br_vid_bitmap
);
160 assert(br_untagged_bitmap
);
161 assert(link
->network
);
163 /* pvid might not be in br_vid_bitmap yet */
165 set_bit(pvid
, br_vid_bitmap
);
167 rtnl
= link
->manager
->rtnl
;
169 /* create new RTM message */
170 r
= sd_rtnl_message_new_link(rtnl
, &req
, RTM_SETLINK
, link
->ifindex
);
172 return log_link_error_errno(link
, r
, "Could not allocate RTM_SETLINK message: %m");
174 r
= sd_rtnl_message_link_set_family(req
, PF_BRIDGE
);
176 return log_link_error_errno(link
, r
, "Could not set message family: %m");
178 r
= sd_netlink_message_open_container(req
, IFLA_AF_SPEC
);
180 return log_link_error_errno(link
, r
, "Could not open IFLA_AF_SPEC container: %m");
182 /* master needs flag self */
183 if (!link
->network
->bridge
) {
184 flags
= BRIDGE_FLAGS_SELF
;
185 sd_netlink_message_append_data(req
, IFLA_BRIDGE_FLAGS
, &flags
, sizeof(uint16_t));
189 r
= append_vlan_info_data(link
, req
, pvid
, br_vid_bitmap
, br_untagged_bitmap
);
191 return log_link_error_errno(link
, r
, "Could not append VLANs: %m");
193 r
= sd_netlink_message_close_container(req
);
195 return log_link_error_errno(link
, r
, "Could not close IFLA_AF_SPEC container: %m");
197 /* send message to the kernel */
198 r
= sd_netlink_call_async(rtnl
, NULL
, req
, set_brvlan_handler
,
199 link_netlink_destroy_callback
, link
, 0, __func__
);
201 return log_link_error_errno(link
, r
, "Could not send rtnetlink message: %m");
208 static int parse_vid_range(const char *rvalue
, uint16_t *vid
, uint16_t *vid_end
) {
211 char *_rvalue
= NULL
;
212 uint16_t _vid
= UINT16_MAX
;
213 uint16_t _vid_end
= UINT16_MAX
;
219 _rvalue
= strdupa(rvalue
);
220 p
= strchr(_rvalue
, '-');
224 r
= parse_vlanid(_rvalue
, &_vid
);
231 r
= parse_vlanid(p
, &_vid_end
);
238 r
= parse_vlanid(_rvalue
, &_vid
);
251 int config_parse_brvlan_pvid(const char *unit
, const char *filename
,
252 unsigned line
, const char *section
,
253 unsigned section_line
, const char *lvalue
,
254 int ltype
, const char *rvalue
, void *data
,
256 Network
*network
= userdata
;
259 r
= parse_vlanid(rvalue
, &pvid
);
263 network
->pvid
= pvid
;
264 network
->use_br_vlan
= true;
269 int config_parse_brvlan_vlan(const char *unit
, const char *filename
,
270 unsigned line
, const char *section
,
271 unsigned section_line
, const char *lvalue
,
272 int ltype
, const char *rvalue
, void *data
,
274 Network
*network
= userdata
;
276 uint16_t vid
, vid_end
;
284 r
= parse_vid_range(rvalue
, &vid
, &vid_end
);
286 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse VLAN, ignoring: %s", rvalue
);
290 if (UINT16_MAX
== vid_end
)
291 set_bit(vid
++, network
->br_vid_bitmap
);
293 if (vid
>= vid_end
) {
294 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Invalid VLAN range, ignoring %s", rvalue
);
297 for (; vid
<= vid_end
; vid
++)
298 set_bit(vid
, network
->br_vid_bitmap
);
300 network
->use_br_vlan
= true;
304 int config_parse_brvlan_untagged(const char *unit
, const char *filename
,
305 unsigned line
, const char *section
,
306 unsigned section_line
, const char *lvalue
,
307 int ltype
, const char *rvalue
, void *data
,
309 Network
*network
= userdata
;
311 uint16_t vid
, vid_end
;
319 r
= parse_vid_range(rvalue
, &vid
, &vid_end
);
321 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Could not parse VLAN: %s", rvalue
);
325 if (UINT16_MAX
== vid_end
) {
326 set_bit(vid
, network
->br_vid_bitmap
);
327 set_bit(vid
, network
->br_untagged_bitmap
);
329 if (vid
>= vid_end
) {
330 log_syntax(unit
, LOG_ERR
, filename
, line
, 0, "Invalid VLAN range, ignoring %s", rvalue
);
333 for (; vid
<= vid_end
; vid
++) {
334 set_bit(vid
, network
->br_vid_bitmap
);
335 set_bit(vid
, network
->br_untagged_bitmap
);
338 network
->use_br_vlan
= true;