2 * swlib.c: Switch configuration API (user space part)
4 * Copyright (C) 2008 Felix Fietkau <nbd@nbd.name>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * version 2.1 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
24 #include <sys/types.h>
25 #include <sys/socket.h>
26 #include <linux/switch.h>
28 #include <netlink/netlink.h>
29 #include <netlink/genl/genl.h>
30 #include <netlink/genl/family.h>
34 #define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
36 #define DPRINTF(fmt, ...) do {} while (0)
39 static struct nl_sock
*handle
;
40 static struct nl_cache
*cache
;
41 static struct genl_family
*family
;
42 static struct nlattr
*tb
[SWITCH_ATTR_MAX
+ 1];
43 static int refcount
= 0;
45 static struct nla_policy port_policy
[SWITCH_ATTR_MAX
] = {
46 [SWITCH_PORT_ID
] = { .type
= NLA_U32
},
47 [SWITCH_PORT_FLAG_TAGGED
] = { .type
= NLA_FLAG
},
50 static struct nla_policy portmap_policy
[SWITCH_PORTMAP_MAX
] = {
51 [SWITCH_PORTMAP_SEGMENT
] = { .type
= NLA_STRING
},
52 [SWITCH_PORTMAP_VIRT
] = { .type
= NLA_U32
},
55 static struct nla_policy link_policy
[SWITCH_LINK_ATTR_MAX
] = {
56 [SWITCH_LINK_FLAG_LINK
] = { .type
= NLA_FLAG
},
57 [SWITCH_LINK_FLAG_DUPLEX
] = { .type
= NLA_FLAG
},
58 [SWITCH_LINK_FLAG_ANEG
] = { .type
= NLA_FLAG
},
59 [SWITCH_LINK_SPEED
] = { .type
= NLA_U32
},
60 [SWITCH_LINK_FLAG_EEE_100BASET
] = { .type
= NLA_FLAG
},
61 [SWITCH_LINK_FLAG_EEE_1000BASET
] = { .type
= NLA_FLAG
},
65 swlib_alloc(size_t size
)
79 wait_handler(struct nl_msg
*msg
, void *arg
)
87 /* helper function for performing netlink requests */
89 swlib_call(int cmd
, int (*call
)(struct nl_msg
*, void *),
90 int (*data
)(struct nl_msg
*, void *), void *arg
)
93 struct nl_cb
*cb
= NULL
;
100 fprintf(stderr
, "Out of memory!\n");
107 genlmsg_put(msg
, NL_AUTO_PID
, NL_AUTO_SEQ
, genl_family_get_id(family
), 0, flags
, cmd
, 0);
109 err
= data(msg
, arg
);
111 goto nla_put_failure
;
114 cb
= nl_cb_alloc(NL_CB_CUSTOM
);
116 fprintf(stderr
, "nl_cb_alloc failed.\n");
120 err
= nl_send_auto_complete(handle
, msg
);
122 fprintf(stderr
, "nl_send_auto_complete failed: %d\n", err
);
129 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, call
, arg
);
132 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, wait_handler
, &finished
);
134 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, wait_handler
, &finished
);
136 err
= nl_recvmsgs(handle
, cb
);
142 err
= nl_wait_for_ack(handle
);
153 send_attr(struct nl_msg
*msg
, void *arg
)
155 struct switch_val
*val
= arg
;
156 struct switch_attr
*attr
= val
->attr
;
158 NLA_PUT_U32(msg
, SWITCH_ATTR_ID
, attr
->dev
->id
);
159 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_ID
, attr
->id
);
160 switch(attr
->atype
) {
161 case SWLIB_ATTR_GROUP_PORT
:
162 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_PORT
, val
->port_vlan
);
164 case SWLIB_ATTR_GROUP_VLAN
:
165 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_VLAN
, val
->port_vlan
);
178 store_port_val(struct nl_msg
*msg
, struct nlattr
*nla
, struct switch_val
*val
)
181 int ports
= val
->attr
->dev
->ports
;
185 if (!val
->value
.ports
)
186 val
->value
.ports
= malloc(sizeof(struct switch_port
) * ports
);
188 nla_for_each_nested(p
, nla
, remaining
) {
189 struct nlattr
*tb
[SWITCH_PORT_ATTR_MAX
+1];
190 struct switch_port
*port
;
192 if (val
->len
>= ports
)
195 err
= nla_parse_nested(tb
, SWITCH_PORT_ATTR_MAX
, p
, port_policy
);
199 if (!tb
[SWITCH_PORT_ID
])
202 port
= &val
->value
.ports
[val
->len
];
203 port
->id
= nla_get_u32(tb
[SWITCH_PORT_ID
]);
205 if (tb
[SWITCH_PORT_FLAG_TAGGED
])
206 port
->flags
|= SWLIB_PORT_FLAG_TAGGED
;
216 store_link_val(struct nl_msg
*msg
, struct nlattr
*nla
, struct switch_val
*val
)
218 struct nlattr
*tb
[SWITCH_LINK_ATTR_MAX
+ 1];
219 struct switch_port_link
*link
;
222 if (!val
->value
.link
)
223 val
->value
.link
= malloc(sizeof(struct switch_port_link
));
225 err
= nla_parse_nested(tb
, SWITCH_LINK_ATTR_MAX
, nla
, link_policy
);
229 link
= val
->value
.link
;
230 link
->link
= !!tb
[SWITCH_LINK_FLAG_LINK
];
231 link
->duplex
= !!tb
[SWITCH_LINK_FLAG_DUPLEX
];
232 link
->aneg
= !!tb
[SWITCH_LINK_FLAG_ANEG
];
233 link
->tx_flow
= !!tb
[SWITCH_LINK_FLAG_TX_FLOW
];
234 link
->rx_flow
= !!tb
[SWITCH_LINK_FLAG_RX_FLOW
];
235 link
->speed
= nla_get_u32(tb
[SWITCH_LINK_SPEED
]);
237 if (tb
[SWITCH_LINK_FLAG_EEE_100BASET
])
238 link
->eee
|= SWLIB_LINK_FLAG_EEE_100BASET
;
239 if (tb
[SWITCH_LINK_FLAG_EEE_1000BASET
])
240 link
->eee
|= SWLIB_LINK_FLAG_EEE_1000BASET
;
247 store_val(struct nl_msg
*msg
, void *arg
)
249 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
250 struct switch_val
*val
= arg
;
255 if (nla_parse(tb
, SWITCH_ATTR_MAX
- 1, genlmsg_attrdata(gnlh
, 0),
256 genlmsg_attrlen(gnlh
, 0), NULL
) < 0) {
260 if (tb
[SWITCH_ATTR_OP_VALUE_INT
])
261 val
->value
.i
= nla_get_u32(tb
[SWITCH_ATTR_OP_VALUE_INT
]);
262 else if (tb
[SWITCH_ATTR_OP_VALUE_STR
])
263 val
->value
.s
= strdup(nla_get_string(tb
[SWITCH_ATTR_OP_VALUE_STR
]));
264 else if (tb
[SWITCH_ATTR_OP_VALUE_PORTS
])
265 val
->err
= store_port_val(msg
, tb
[SWITCH_ATTR_OP_VALUE_PORTS
], val
);
266 else if (tb
[SWITCH_ATTR_OP_VALUE_LINK
])
267 val
->err
= store_link_val(msg
, tb
[SWITCH_ATTR_OP_VALUE_LINK
], val
);
277 swlib_get_attr(struct switch_dev
*dev
, struct switch_attr
*attr
, struct switch_val
*val
)
282 switch(attr
->atype
) {
283 case SWLIB_ATTR_GROUP_GLOBAL
:
284 cmd
= SWITCH_CMD_GET_GLOBAL
;
286 case SWLIB_ATTR_GROUP_PORT
:
287 cmd
= SWITCH_CMD_GET_PORT
;
289 case SWLIB_ATTR_GROUP_VLAN
:
290 cmd
= SWITCH_CMD_GET_VLAN
;
296 memset(&val
->value
, 0, sizeof(val
->value
));
300 err
= swlib_call(cmd
, store_val
, send_attr
, val
);
308 send_attr_ports(struct nl_msg
*msg
, struct switch_val
*val
)
313 /* TODO implement multipart? */
316 n
= nla_nest_start(msg
, SWITCH_ATTR_OP_VALUE_PORTS
);
318 goto nla_put_failure
;
319 for (i
= 0; i
< val
->len
; i
++) {
320 struct switch_port
*port
= &val
->value
.ports
[i
];
323 np
= nla_nest_start(msg
, SWITCH_ATTR_PORT
);
325 goto nla_put_failure
;
327 NLA_PUT_U32(msg
, SWITCH_PORT_ID
, port
->id
);
328 if (port
->flags
& SWLIB_PORT_FLAG_TAGGED
)
329 NLA_PUT_FLAG(msg
, SWITCH_PORT_FLAG_TAGGED
);
331 nla_nest_end(msg
, np
);
333 nla_nest_end(msg
, n
);
342 send_attr_link(struct nl_msg
*msg
, struct switch_val
*val
)
344 struct switch_port_link
*link
= val
->value
.link
;
347 n
= nla_nest_start(msg
, SWITCH_ATTR_OP_VALUE_LINK
);
349 goto nla_put_failure
;
352 NLA_PUT_FLAG(msg
, SWITCH_LINK_FLAG_DUPLEX
);
354 NLA_PUT_FLAG(msg
, SWITCH_LINK_FLAG_ANEG
);
355 NLA_PUT_U32(msg
, SWITCH_LINK_SPEED
, link
->speed
);
357 nla_nest_end(msg
, n
);
366 send_attr_val(struct nl_msg
*msg
, void *arg
)
368 struct switch_val
*val
= arg
;
369 struct switch_attr
*attr
= val
->attr
;
371 if (send_attr(msg
, arg
))
372 goto nla_put_failure
;
375 case SWITCH_TYPE_NOVAL
:
377 case SWITCH_TYPE_INT
:
378 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_VALUE_INT
, val
->value
.i
);
380 case SWITCH_TYPE_STRING
:
382 goto nla_put_failure
;
383 NLA_PUT_STRING(msg
, SWITCH_ATTR_OP_VALUE_STR
, val
->value
.s
);
385 case SWITCH_TYPE_PORTS
:
386 if (send_attr_ports(msg
, val
) < 0)
387 goto nla_put_failure
;
389 case SWITCH_TYPE_LINK
:
390 if (send_attr_link(msg
, val
))
391 goto nla_put_failure
;
394 goto nla_put_failure
;
403 swlib_set_attr(struct switch_dev
*dev
, struct switch_attr
*attr
, struct switch_val
*val
)
407 switch(attr
->atype
) {
408 case SWLIB_ATTR_GROUP_GLOBAL
:
409 cmd
= SWITCH_CMD_SET_GLOBAL
;
411 case SWLIB_ATTR_GROUP_PORT
:
412 cmd
= SWITCH_CMD_SET_PORT
;
414 case SWLIB_ATTR_GROUP_VLAN
:
415 cmd
= SWITCH_CMD_SET_VLAN
;
422 return swlib_call(cmd
, NULL
, send_attr_val
, val
);
432 int swlib_set_attr_string(struct switch_dev
*dev
, struct switch_attr
*a
, int port_vlan
, const char *str
)
434 struct switch_port
*ports
;
435 struct switch_port_link
*link
;
436 struct switch_val val
;
440 memset(&val
, 0, sizeof(val
));
441 val
.port_vlan
= port_vlan
;
443 case SWITCH_TYPE_INT
:
444 val
.value
.i
= atoi(str
);
446 case SWITCH_TYPE_STRING
:
447 val
.value
.s
= (char *)str
;
449 case SWITCH_TYPE_PORTS
:
450 ports
= alloca(sizeof(struct switch_port
) * dev
->ports
);
451 memset(ports
, 0, sizeof(struct switch_port
) * dev
->ports
);
456 while(*ptr
&& isspace(*ptr
))
465 if (val
.len
>= dev
->ports
)
468 ports
[val
.len
].flags
= 0;
469 ports
[val
.len
].id
= strtoul(ptr
, &ptr
, 10);
470 while(*ptr
&& !isspace(*ptr
)) {
472 ports
[val
.len
].flags
|= SWLIB_PORT_FLAG_TAGGED
;
482 val
.value
.ports
= ports
;
484 case SWITCH_TYPE_LINK
:
485 link
= malloc(sizeof(struct switch_port_link
));
486 memset(link
, 0, sizeof(struct switch_port_link
));
488 for (ptr
= strtok(ptr
," "); ptr
; ptr
= strtok(NULL
, " ")) {
491 if (!strcmp(ptr
, "duplex"))
493 else if (!strcmp(ptr
, "autoneg"))
495 else if (!strcmp(ptr
, "speed"))
498 fprintf(stderr
, "Unsupported option %s\n", ptr
);
501 if (!strcmp(ptr
, "half"))
503 else if (!strcmp(ptr
, "full"))
506 fprintf(stderr
, "Unsupported value %s\n", ptr
);
510 if (!strcmp(ptr
, "on"))
512 else if (!strcmp(ptr
, "off"))
515 fprintf(stderr
, "Unsupported value %s\n", ptr
);
519 link
->speed
= atoi(ptr
);
524 val
.value
.link
= link
;
526 case SWITCH_TYPE_NOVAL
:
527 if (str
&& !strcmp(str
, "0"))
534 return swlib_set_attr(dev
, a
, &val
);
538 struct attrlist_arg
{
541 struct switch_dev
*dev
;
542 struct switch_attr
*prev
;
543 struct switch_attr
**head
;
547 add_id(struct nl_msg
*msg
, void *arg
)
549 struct attrlist_arg
*l
= arg
;
551 NLA_PUT_U32(msg
, SWITCH_ATTR_ID
, l
->id
);
559 add_attr(struct nl_msg
*msg
, void *ptr
)
561 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
562 struct attrlist_arg
*arg
= ptr
;
563 struct switch_attr
*new;
565 if (nla_parse(tb
, SWITCH_ATTR_MAX
- 1, genlmsg_attrdata(gnlh
, 0),
566 genlmsg_attrlen(gnlh
, 0), NULL
) < 0)
569 new = swlib_alloc(sizeof(struct switch_attr
));
574 new->atype
= arg
->atype
;
576 arg
->prev
->next
= new;
578 arg
->prev
= *arg
->head
;
581 arg
->head
= &new->next
;
583 if (tb
[SWITCH_ATTR_OP_ID
])
584 new->id
= nla_get_u32(tb
[SWITCH_ATTR_OP_ID
]);
585 if (tb
[SWITCH_ATTR_OP_TYPE
])
586 new->type
= nla_get_u32(tb
[SWITCH_ATTR_OP_TYPE
]);
587 if (tb
[SWITCH_ATTR_OP_NAME
])
588 new->name
= strdup(nla_get_string(tb
[SWITCH_ATTR_OP_NAME
]));
589 if (tb
[SWITCH_ATTR_OP_DESCRIPTION
])
590 new->description
= strdup(nla_get_string(tb
[SWITCH_ATTR_OP_DESCRIPTION
]));
597 swlib_scan(struct switch_dev
*dev
)
599 struct attrlist_arg arg
;
601 if (dev
->ops
|| dev
->port_ops
|| dev
->vlan_ops
)
604 arg
.atype
= SWLIB_ATTR_GROUP_GLOBAL
;
608 arg
.head
= &dev
->ops
;
609 swlib_call(SWITCH_CMD_LIST_GLOBAL
, add_attr
, add_id
, &arg
);
611 arg
.atype
= SWLIB_ATTR_GROUP_PORT
;
613 arg
.head
= &dev
->port_ops
;
614 swlib_call(SWITCH_CMD_LIST_PORT
, add_attr
, add_id
, &arg
);
616 arg
.atype
= SWLIB_ATTR_GROUP_VLAN
;
618 arg
.head
= &dev
->vlan_ops
;
619 swlib_call(SWITCH_CMD_LIST_VLAN
, add_attr
, add_id
, &arg
);
624 struct switch_attr
*swlib_lookup_attr(struct switch_dev
*dev
,
625 enum swlib_attr_group atype
, const char *name
)
627 struct switch_attr
*head
;
633 case SWLIB_ATTR_GROUP_GLOBAL
:
636 case SWLIB_ATTR_GROUP_PORT
:
637 head
= dev
->port_ops
;
639 case SWLIB_ATTR_GROUP_VLAN
:
640 head
= dev
->vlan_ops
;
644 if (!strcmp(name
, head
->name
))
653 swlib_priv_free(void)
656 nl_object_put((struct nl_object
*)family
);
658 nl_cache_free(cache
);
660 nl_socket_free(handle
);
667 swlib_priv_init(void)
671 handle
= nl_socket_alloc();
673 DPRINTF("Failed to create handle\n");
677 if (genl_connect(handle
)) {
678 DPRINTF("Failed to connect to generic netlink\n");
682 ret
= genl_ctrl_alloc_cache(handle
, &cache
);
684 DPRINTF("Failed to allocate netlink cache\n");
688 family
= genl_ctrl_search_by_name(cache
, "switch");
690 DPRINTF("Switch API not present\n");
700 struct swlib_scan_arg
{
702 struct switch_dev
*head
;
703 struct switch_dev
*ptr
;
707 add_port_map(struct switch_dev
*dev
, struct nlattr
*nla
)
710 int err
= 0, idx
= 0;
713 dev
->maps
= malloc(sizeof(struct switch_portmap
) * dev
->ports
);
716 memset(dev
->maps
, 0, sizeof(struct switch_portmap
) * dev
->ports
);
718 nla_for_each_nested(p
, nla
, remaining
) {
719 struct nlattr
*tb
[SWITCH_PORTMAP_MAX
+1];
721 if (idx
>= dev
->ports
)
724 err
= nla_parse_nested(tb
, SWITCH_PORTMAP_MAX
, p
, portmap_policy
);
729 if (tb
[SWITCH_PORTMAP_SEGMENT
] && tb
[SWITCH_PORTMAP_VIRT
]) {
730 dev
->maps
[idx
].segment
= strdup(nla_get_string(tb
[SWITCH_PORTMAP_SEGMENT
]));
731 dev
->maps
[idx
].virt
= nla_get_u32(tb
[SWITCH_PORTMAP_VIRT
]);
742 add_switch(struct nl_msg
*msg
, void *arg
)
744 struct swlib_scan_arg
*sa
= arg
;
745 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
746 struct switch_dev
*dev
;
750 if (nla_parse(tb
, SWITCH_ATTR_MAX
, genlmsg_attrdata(gnlh
, 0), genlmsg_attrlen(gnlh
, 0), NULL
) < 0)
753 if (!tb
[SWITCH_ATTR_DEV_NAME
])
756 name
= nla_get_string(tb
[SWITCH_ATTR_DEV_NAME
]);
757 alias
= nla_get_string(tb
[SWITCH_ATTR_ALIAS
]);
759 if (sa
->name
&& (strcmp(name
, sa
->name
) != 0) && (strcmp(alias
, sa
->name
) != 0))
762 dev
= swlib_alloc(sizeof(struct switch_dev
));
766 strncpy(dev
->dev_name
, name
, IFNAMSIZ
- 1);
767 dev
->alias
= strdup(alias
);
768 if (tb
[SWITCH_ATTR_ID
])
769 dev
->id
= nla_get_u32(tb
[SWITCH_ATTR_ID
]);
770 if (tb
[SWITCH_ATTR_NAME
])
771 dev
->name
= strdup(nla_get_string(tb
[SWITCH_ATTR_NAME
]));
772 if (tb
[SWITCH_ATTR_PORTS
])
773 dev
->ports
= nla_get_u32(tb
[SWITCH_ATTR_PORTS
]);
774 if (tb
[SWITCH_ATTR_VLANS
])
775 dev
->vlans
= nla_get_u32(tb
[SWITCH_ATTR_VLANS
]);
776 if (tb
[SWITCH_ATTR_CPU_PORT
])
777 dev
->cpu_port
= nla_get_u32(tb
[SWITCH_ATTR_CPU_PORT
]);
778 if (tb
[SWITCH_ATTR_PORTMAP
])
779 add_port_map(dev
, tb
[SWITCH_ATTR_PORTMAP
]);
795 list_switch(struct nl_msg
*msg
, void *arg
)
797 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
799 if (nla_parse(tb
, SWITCH_ATTR_MAX
, genlmsg_attrdata(gnlh
, 0), genlmsg_attrlen(gnlh
, 0), NULL
) < 0)
802 if (!tb
[SWITCH_ATTR_DEV_NAME
] || !tb
[SWITCH_ATTR_NAME
])
805 printf("Found: %s - %s\n", nla_get_string(tb
[SWITCH_ATTR_DEV_NAME
]),
806 nla_get_string(tb
[SWITCH_ATTR_ALIAS
]));
815 if (swlib_priv_init() < 0)
817 swlib_call(SWITCH_CMD_GET_SWITCH
, list_switch
, NULL
, NULL
);
822 swlib_print_portmap(struct switch_dev
*dev
, char *segment
)
827 if (!strcmp(segment
, "cpu")) {
828 printf("%d ", dev
->cpu_port
);
829 } else if (!strcmp(segment
, "disabled")) {
830 for (i
= 0; i
< dev
->ports
; i
++)
831 if (!dev
->maps
[i
].segment
)
833 } else for (i
= 0; i
< dev
->ports
; i
++) {
834 if (dev
->maps
[i
].segment
&& !strcmp(dev
->maps
[i
].segment
, segment
))
838 printf("%s - %s\n", dev
->dev_name
, dev
->name
);
839 for (i
= 0; i
< dev
->ports
; i
++)
840 if (i
== dev
->cpu_port
)
841 printf("port%d:\tcpu\n", i
);
842 else if (dev
->maps
[i
].segment
)
843 printf("port%d:\t%s.%d\n", i
, dev
->maps
[i
].segment
, dev
->maps
[i
].virt
);
845 printf("port%d:\tdisabled\n", i
);
850 swlib_connect(const char *name
)
852 struct swlib_scan_arg arg
;
855 if (swlib_priv_init() < 0)
862 swlib_call(SWITCH_CMD_GET_SWITCH
, add_switch
, NULL
, &arg
);
871 swlib_free_attributes(struct switch_attr
**head
)
873 struct switch_attr
*a
= *head
;
874 struct switch_attr
*next
;
879 free(a
->description
);
887 swlib_free_port_map(struct switch_dev
*dev
)
891 if (!dev
|| !dev
->maps
)
894 for (i
= 0; i
< dev
->ports
; i
++)
895 free(dev
->maps
[i
].segment
);
900 swlib_free(struct switch_dev
*dev
)
902 swlib_free_attributes(&dev
->ops
);
903 swlib_free_attributes(&dev
->port_ops
);
904 swlib_free_attributes(&dev
->vlan_ops
);
905 swlib_free_port_map(dev
);
915 swlib_free_all(struct switch_dev
*dev
)
917 struct switch_dev
*p
;