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.
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <linux/switch.h>
27 #include <netlink/netlink.h>
28 #include <netlink/genl/genl.h>
29 #include <netlink/genl/family.h>
33 #define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__)
35 #define DPRINTF(fmt, ...) do {} while (0)
38 static struct nl_sock
*handle
;
39 static struct nl_cache
*cache
;
40 static struct genl_family
*family
;
41 static struct nlattr
*tb
[SWITCH_ATTR_MAX
+ 1];
42 static int refcount
= 0;
44 static struct nla_policy port_policy
[SWITCH_ATTR_MAX
] = {
45 [SWITCH_PORT_ID
] = { .type
= NLA_U32
},
46 [SWITCH_PORT_FLAG_TAGGED
] = { .type
= NLA_FLAG
},
49 static struct nla_policy portmap_policy
[SWITCH_PORTMAP_MAX
] = {
50 [SWITCH_PORTMAP_SEGMENT
] = { .type
= NLA_STRING
},
51 [SWITCH_PORTMAP_VIRT
] = { .type
= NLA_U32
},
54 static struct nla_policy link_policy
[SWITCH_LINK_ATTR_MAX
] = {
55 [SWITCH_LINK_FLAG_LINK
] = { .type
= NLA_FLAG
},
56 [SWITCH_LINK_FLAG_DUPLEX
] = { .type
= NLA_FLAG
},
57 [SWITCH_LINK_FLAG_ANEG
] = { .type
= NLA_FLAG
},
58 [SWITCH_LINK_SPEED
] = { .type
= NLA_U32
},
59 [SWITCH_LINK_FLAG_EEE_100BASET
] = { .type
= NLA_FLAG
},
60 [SWITCH_LINK_FLAG_EEE_1000BASET
] = { .type
= NLA_FLAG
},
64 swlib_alloc(size_t size
)
78 wait_handler(struct nl_msg
*msg
, void *arg
)
86 /* helper function for performing netlink requests */
88 swlib_call(int cmd
, int (*call
)(struct nl_msg
*, void *),
89 int (*data
)(struct nl_msg
*, void *), void *arg
)
92 struct nl_cb
*cb
= NULL
;
99 fprintf(stderr
, "Out of memory!\n");
106 genlmsg_put(msg
, NL_AUTO_PID
, NL_AUTO_SEQ
, genl_family_get_id(family
), 0, flags
, cmd
, 0);
108 if (data(msg
, arg
) < 0)
109 goto nla_put_failure
;
112 cb
= nl_cb_alloc(NL_CB_CUSTOM
);
114 fprintf(stderr
, "nl_cb_alloc failed.\n");
118 err
= nl_send_auto_complete(handle
, msg
);
120 fprintf(stderr
, "nl_send_auto_complete failed: %d\n", err
);
127 nl_cb_set(cb
, NL_CB_VALID
, NL_CB_CUSTOM
, call
, arg
);
130 nl_cb_set(cb
, NL_CB_ACK
, NL_CB_CUSTOM
, wait_handler
, &finished
);
132 nl_cb_set(cb
, NL_CB_FINISH
, NL_CB_CUSTOM
, wait_handler
, &finished
);
134 err
= nl_recvmsgs(handle
, cb
);
140 err
= nl_wait_for_ack(handle
);
151 send_attr(struct nl_msg
*msg
, void *arg
)
153 struct switch_val
*val
= arg
;
154 struct switch_attr
*attr
= val
->attr
;
156 NLA_PUT_U32(msg
, SWITCH_ATTR_ID
, attr
->dev
->id
);
157 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_ID
, attr
->id
);
158 switch(attr
->atype
) {
159 case SWLIB_ATTR_GROUP_PORT
:
160 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_PORT
, val
->port_vlan
);
162 case SWLIB_ATTR_GROUP_VLAN
:
163 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_VLAN
, val
->port_vlan
);
176 store_port_val(struct nl_msg
*msg
, struct nlattr
*nla
, struct switch_val
*val
)
179 int ports
= val
->attr
->dev
->ports
;
183 if (!val
->value
.ports
)
184 val
->value
.ports
= malloc(sizeof(struct switch_port
) * ports
);
186 nla_for_each_nested(p
, nla
, remaining
) {
187 struct nlattr
*tb
[SWITCH_PORT_ATTR_MAX
+1];
188 struct switch_port
*port
;
190 if (val
->len
>= ports
)
193 err
= nla_parse_nested(tb
, SWITCH_PORT_ATTR_MAX
, p
, port_policy
);
197 if (!tb
[SWITCH_PORT_ID
])
200 port
= &val
->value
.ports
[val
->len
];
201 port
->id
= nla_get_u32(tb
[SWITCH_PORT_ID
]);
203 if (tb
[SWITCH_PORT_FLAG_TAGGED
])
204 port
->flags
|= SWLIB_PORT_FLAG_TAGGED
;
214 store_link_val(struct nl_msg
*msg
, struct nlattr
*nla
, struct switch_val
*val
)
216 struct nlattr
*tb
[SWITCH_LINK_ATTR_MAX
+ 1];
217 struct switch_port_link
*link
;
220 if (!val
->value
.link
)
221 val
->value
.link
= malloc(sizeof(struct switch_port_link
));
223 err
= nla_parse_nested(tb
, SWITCH_LINK_ATTR_MAX
, nla
, link_policy
);
227 link
= val
->value
.link
;
228 link
->link
= !!tb
[SWITCH_LINK_FLAG_LINK
];
229 link
->duplex
= !!tb
[SWITCH_LINK_FLAG_DUPLEX
];
230 link
->aneg
= !!tb
[SWITCH_LINK_FLAG_ANEG
];
231 link
->tx_flow
= !!tb
[SWITCH_LINK_FLAG_TX_FLOW
];
232 link
->rx_flow
= !!tb
[SWITCH_LINK_FLAG_RX_FLOW
];
233 link
->speed
= nla_get_u32(tb
[SWITCH_LINK_SPEED
]);
235 if (tb
[SWITCH_LINK_FLAG_EEE_100BASET
])
236 link
->eee
|= SWLIB_LINK_FLAG_EEE_100BASET
;
237 if (tb
[SWITCH_LINK_FLAG_EEE_1000BASET
])
238 link
->eee
|= SWLIB_LINK_FLAG_EEE_1000BASET
;
245 store_val(struct nl_msg
*msg
, void *arg
)
247 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
248 struct switch_val
*val
= arg
;
253 if (nla_parse(tb
, SWITCH_ATTR_MAX
- 1, genlmsg_attrdata(gnlh
, 0),
254 genlmsg_attrlen(gnlh
, 0), NULL
) < 0) {
258 if (tb
[SWITCH_ATTR_OP_VALUE_INT
])
259 val
->value
.i
= nla_get_u32(tb
[SWITCH_ATTR_OP_VALUE_INT
]);
260 else if (tb
[SWITCH_ATTR_OP_VALUE_STR
])
261 val
->value
.s
= strdup(nla_get_string(tb
[SWITCH_ATTR_OP_VALUE_STR
]));
262 else if (tb
[SWITCH_ATTR_OP_VALUE_PORTS
])
263 val
->err
= store_port_val(msg
, tb
[SWITCH_ATTR_OP_VALUE_PORTS
], val
);
264 else if (tb
[SWITCH_ATTR_OP_VALUE_LINK
])
265 val
->err
= store_link_val(msg
, tb
[SWITCH_ATTR_OP_VALUE_LINK
], val
);
275 swlib_get_attr(struct switch_dev
*dev
, struct switch_attr
*attr
, struct switch_val
*val
)
280 switch(attr
->atype
) {
281 case SWLIB_ATTR_GROUP_GLOBAL
:
282 cmd
= SWITCH_CMD_GET_GLOBAL
;
284 case SWLIB_ATTR_GROUP_PORT
:
285 cmd
= SWITCH_CMD_GET_PORT
;
287 case SWLIB_ATTR_GROUP_VLAN
:
288 cmd
= SWITCH_CMD_GET_VLAN
;
294 memset(&val
->value
, 0, sizeof(val
->value
));
298 err
= swlib_call(cmd
, store_val
, send_attr
, val
);
306 send_attr_ports(struct nl_msg
*msg
, struct switch_val
*val
)
311 /* TODO implement multipart? */
314 n
= nla_nest_start(msg
, SWITCH_ATTR_OP_VALUE_PORTS
);
316 goto nla_put_failure
;
317 for (i
= 0; i
< val
->len
; i
++) {
318 struct switch_port
*port
= &val
->value
.ports
[i
];
321 np
= nla_nest_start(msg
, SWITCH_ATTR_PORT
);
323 goto nla_put_failure
;
325 NLA_PUT_U32(msg
, SWITCH_PORT_ID
, port
->id
);
326 if (port
->flags
& SWLIB_PORT_FLAG_TAGGED
)
327 NLA_PUT_FLAG(msg
, SWITCH_PORT_FLAG_TAGGED
);
329 nla_nest_end(msg
, np
);
331 nla_nest_end(msg
, n
);
340 send_attr_link(struct nl_msg
*msg
, struct switch_val
*val
)
342 struct switch_port_link
*link
= val
->value
.link
;
345 n
= nla_nest_start(msg
, SWITCH_ATTR_OP_VALUE_LINK
);
347 goto nla_put_failure
;
350 NLA_PUT_FLAG(msg
, SWITCH_LINK_FLAG_DUPLEX
);
352 NLA_PUT_FLAG(msg
, SWITCH_LINK_FLAG_ANEG
);
353 NLA_PUT_U32(msg
, SWITCH_LINK_SPEED
, link
->speed
);
355 nla_nest_end(msg
, n
);
364 send_attr_val(struct nl_msg
*msg
, void *arg
)
366 struct switch_val
*val
= arg
;
367 struct switch_attr
*attr
= val
->attr
;
369 if (send_attr(msg
, arg
))
370 goto nla_put_failure
;
373 case SWITCH_TYPE_NOVAL
:
375 case SWITCH_TYPE_INT
:
376 NLA_PUT_U32(msg
, SWITCH_ATTR_OP_VALUE_INT
, val
->value
.i
);
378 case SWITCH_TYPE_STRING
:
380 goto nla_put_failure
;
381 NLA_PUT_STRING(msg
, SWITCH_ATTR_OP_VALUE_STR
, val
->value
.s
);
383 case SWITCH_TYPE_PORTS
:
384 if (send_attr_ports(msg
, val
) < 0)
385 goto nla_put_failure
;
387 case SWITCH_TYPE_LINK
:
388 if (send_attr_link(msg
, val
))
389 goto nla_put_failure
;
392 goto nla_put_failure
;
401 swlib_set_attr(struct switch_dev
*dev
, struct switch_attr
*attr
, struct switch_val
*val
)
405 switch(attr
->atype
) {
406 case SWLIB_ATTR_GROUP_GLOBAL
:
407 cmd
= SWITCH_CMD_SET_GLOBAL
;
409 case SWLIB_ATTR_GROUP_PORT
:
410 cmd
= SWITCH_CMD_SET_PORT
;
412 case SWLIB_ATTR_GROUP_VLAN
:
413 cmd
= SWITCH_CMD_SET_VLAN
;
420 return swlib_call(cmd
, NULL
, send_attr_val
, val
);
430 int swlib_set_attr_string(struct switch_dev
*dev
, struct switch_attr
*a
, int port_vlan
, const char *str
)
432 struct switch_port
*ports
;
433 struct switch_port_link
*link
;
434 struct switch_val val
;
438 memset(&val
, 0, sizeof(val
));
439 val
.port_vlan
= port_vlan
;
441 case SWITCH_TYPE_INT
:
442 val
.value
.i
= atoi(str
);
444 case SWITCH_TYPE_STRING
:
445 val
.value
.s
= (char *)str
;
447 case SWITCH_TYPE_PORTS
:
448 ports
= alloca(sizeof(struct switch_port
) * dev
->ports
);
449 memset(ports
, 0, sizeof(struct switch_port
) * dev
->ports
);
454 while(*ptr
&& isspace(*ptr
))
463 if (val
.len
>= dev
->ports
)
466 ports
[val
.len
].flags
= 0;
467 ports
[val
.len
].id
= strtoul(ptr
, &ptr
, 10);
468 while(*ptr
&& !isspace(*ptr
)) {
470 ports
[val
.len
].flags
|= SWLIB_PORT_FLAG_TAGGED
;
480 val
.value
.ports
= ports
;
482 case SWITCH_TYPE_LINK
:
483 link
= malloc(sizeof(struct switch_port_link
));
484 memset(link
, 0, sizeof(struct switch_port_link
));
486 for (ptr
= strtok(ptr
," "); ptr
; ptr
= strtok(NULL
, " ")) {
489 if (!strcmp(ptr
, "duplex"))
491 else if (!strcmp(ptr
, "autoneg"))
493 else if (!strcmp(ptr
, "speed"))
496 fprintf(stderr
, "Unsupported option %s\n", ptr
);
499 if (!strcmp(ptr
, "half"))
501 else if (!strcmp(ptr
, "full"))
504 fprintf(stderr
, "Unsupported value %s\n", ptr
);
508 if (!strcmp(ptr
, "on"))
510 else if (!strcmp(ptr
, "off"))
513 fprintf(stderr
, "Unsupported value %s\n", ptr
);
517 link
->speed
= atoi(ptr
);
522 val
.value
.link
= link
;
524 case SWITCH_TYPE_NOVAL
:
525 if (str
&& !strcmp(str
, "0"))
532 return swlib_set_attr(dev
, a
, &val
);
536 struct attrlist_arg
{
539 struct switch_dev
*dev
;
540 struct switch_attr
*prev
;
541 struct switch_attr
**head
;
545 add_id(struct nl_msg
*msg
, void *arg
)
547 struct attrlist_arg
*l
= arg
;
549 NLA_PUT_U32(msg
, SWITCH_ATTR_ID
, l
->id
);
557 add_attr(struct nl_msg
*msg
, void *ptr
)
559 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
560 struct attrlist_arg
*arg
= ptr
;
561 struct switch_attr
*new;
563 if (nla_parse(tb
, SWITCH_ATTR_MAX
- 1, genlmsg_attrdata(gnlh
, 0),
564 genlmsg_attrlen(gnlh
, 0), NULL
) < 0)
567 new = swlib_alloc(sizeof(struct switch_attr
));
572 new->atype
= arg
->atype
;
574 arg
->prev
->next
= new;
576 arg
->prev
= *arg
->head
;
579 arg
->head
= &new->next
;
581 if (tb
[SWITCH_ATTR_OP_ID
])
582 new->id
= nla_get_u32(tb
[SWITCH_ATTR_OP_ID
]);
583 if (tb
[SWITCH_ATTR_OP_TYPE
])
584 new->type
= nla_get_u32(tb
[SWITCH_ATTR_OP_TYPE
]);
585 if (tb
[SWITCH_ATTR_OP_NAME
])
586 new->name
= strdup(nla_get_string(tb
[SWITCH_ATTR_OP_NAME
]));
587 if (tb
[SWITCH_ATTR_OP_DESCRIPTION
])
588 new->description
= strdup(nla_get_string(tb
[SWITCH_ATTR_OP_DESCRIPTION
]));
595 swlib_scan(struct switch_dev
*dev
)
597 struct attrlist_arg arg
;
599 if (dev
->ops
|| dev
->port_ops
|| dev
->vlan_ops
)
602 arg
.atype
= SWLIB_ATTR_GROUP_GLOBAL
;
606 arg
.head
= &dev
->ops
;
607 swlib_call(SWITCH_CMD_LIST_GLOBAL
, add_attr
, add_id
, &arg
);
609 arg
.atype
= SWLIB_ATTR_GROUP_PORT
;
611 arg
.head
= &dev
->port_ops
;
612 swlib_call(SWITCH_CMD_LIST_PORT
, add_attr
, add_id
, &arg
);
614 arg
.atype
= SWLIB_ATTR_GROUP_VLAN
;
616 arg
.head
= &dev
->vlan_ops
;
617 swlib_call(SWITCH_CMD_LIST_VLAN
, add_attr
, add_id
, &arg
);
622 struct switch_attr
*swlib_lookup_attr(struct switch_dev
*dev
,
623 enum swlib_attr_group atype
, const char *name
)
625 struct switch_attr
*head
;
631 case SWLIB_ATTR_GROUP_GLOBAL
:
634 case SWLIB_ATTR_GROUP_PORT
:
635 head
= dev
->port_ops
;
637 case SWLIB_ATTR_GROUP_VLAN
:
638 head
= dev
->vlan_ops
;
642 if (!strcmp(name
, head
->name
))
651 swlib_priv_free(void)
654 nl_object_put((struct nl_object
*)family
);
656 nl_cache_free(cache
);
658 nl_socket_free(handle
);
665 swlib_priv_init(void)
669 handle
= nl_socket_alloc();
671 DPRINTF("Failed to create handle\n");
675 if (genl_connect(handle
)) {
676 DPRINTF("Failed to connect to generic netlink\n");
680 ret
= genl_ctrl_alloc_cache(handle
, &cache
);
682 DPRINTF("Failed to allocate netlink cache\n");
686 family
= genl_ctrl_search_by_name(cache
, "switch");
688 DPRINTF("Switch API not present\n");
698 struct swlib_scan_arg
{
700 struct switch_dev
*head
;
701 struct switch_dev
*ptr
;
705 add_port_map(struct switch_dev
*dev
, struct nlattr
*nla
)
708 int err
= 0, idx
= 0;
711 dev
->maps
= malloc(sizeof(struct switch_portmap
) * dev
->ports
);
714 memset(dev
->maps
, 0, sizeof(struct switch_portmap
) * dev
->ports
);
716 nla_for_each_nested(p
, nla
, remaining
) {
717 struct nlattr
*tb
[SWITCH_PORTMAP_MAX
+1];
719 if (idx
>= dev
->ports
)
722 err
= nla_parse_nested(tb
, SWITCH_PORTMAP_MAX
, p
, portmap_policy
);
727 if (tb
[SWITCH_PORTMAP_SEGMENT
] && tb
[SWITCH_PORTMAP_VIRT
]) {
728 dev
->maps
[idx
].segment
= strdup(nla_get_string(tb
[SWITCH_PORTMAP_SEGMENT
]));
729 dev
->maps
[idx
].virt
= nla_get_u32(tb
[SWITCH_PORTMAP_VIRT
]);
740 add_switch(struct nl_msg
*msg
, void *arg
)
742 struct swlib_scan_arg
*sa
= arg
;
743 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
744 struct switch_dev
*dev
;
748 if (nla_parse(tb
, SWITCH_ATTR_MAX
, genlmsg_attrdata(gnlh
, 0), genlmsg_attrlen(gnlh
, 0), NULL
) < 0)
751 if (!tb
[SWITCH_ATTR_DEV_NAME
])
754 name
= nla_get_string(tb
[SWITCH_ATTR_DEV_NAME
]);
755 alias
= nla_get_string(tb
[SWITCH_ATTR_ALIAS
]);
757 if (sa
->name
&& (strcmp(name
, sa
->name
) != 0) && (strcmp(alias
, sa
->name
) != 0))
760 dev
= swlib_alloc(sizeof(struct switch_dev
));
764 strncpy(dev
->dev_name
, name
, IFNAMSIZ
- 1);
765 dev
->alias
= strdup(alias
);
766 if (tb
[SWITCH_ATTR_ID
])
767 dev
->id
= nla_get_u32(tb
[SWITCH_ATTR_ID
]);
768 if (tb
[SWITCH_ATTR_NAME
])
769 dev
->name
= strdup(nla_get_string(tb
[SWITCH_ATTR_NAME
]));
770 if (tb
[SWITCH_ATTR_PORTS
])
771 dev
->ports
= nla_get_u32(tb
[SWITCH_ATTR_PORTS
]);
772 if (tb
[SWITCH_ATTR_VLANS
])
773 dev
->vlans
= nla_get_u32(tb
[SWITCH_ATTR_VLANS
]);
774 if (tb
[SWITCH_ATTR_CPU_PORT
])
775 dev
->cpu_port
= nla_get_u32(tb
[SWITCH_ATTR_CPU_PORT
]);
776 if (tb
[SWITCH_ATTR_PORTMAP
])
777 add_port_map(dev
, tb
[SWITCH_ATTR_PORTMAP
]);
793 list_switch(struct nl_msg
*msg
, void *arg
)
795 struct genlmsghdr
*gnlh
= nlmsg_data(nlmsg_hdr(msg
));
797 if (nla_parse(tb
, SWITCH_ATTR_MAX
, genlmsg_attrdata(gnlh
, 0), genlmsg_attrlen(gnlh
, 0), NULL
) < 0)
800 if (!tb
[SWITCH_ATTR_DEV_NAME
] || !tb
[SWITCH_ATTR_NAME
])
803 printf("Found: %s - %s\n", nla_get_string(tb
[SWITCH_ATTR_DEV_NAME
]),
804 nla_get_string(tb
[SWITCH_ATTR_ALIAS
]));
813 if (swlib_priv_init() < 0)
815 swlib_call(SWITCH_CMD_GET_SWITCH
, list_switch
, NULL
, NULL
);
820 swlib_print_portmap(struct switch_dev
*dev
, char *segment
)
825 if (!strcmp(segment
, "cpu")) {
826 printf("%d ", dev
->cpu_port
);
827 } else if (!strcmp(segment
, "disabled")) {
828 for (i
= 0; i
< dev
->ports
; i
++)
829 if (!dev
->maps
[i
].segment
)
831 } else for (i
= 0; i
< dev
->ports
; i
++) {
832 if (dev
->maps
[i
].segment
&& !strcmp(dev
->maps
[i
].segment
, segment
))
836 printf("%s - %s\n", dev
->dev_name
, dev
->name
);
837 for (i
= 0; i
< dev
->ports
; i
++)
838 if (i
== dev
->cpu_port
)
839 printf("port%d:\tcpu\n", i
);
840 else if (dev
->maps
[i
].segment
)
841 printf("port%d:\t%s.%d\n", i
, dev
->maps
[i
].segment
, dev
->maps
[i
].virt
);
843 printf("port%d:\tdisabled\n", i
);
848 swlib_connect(const char *name
)
850 struct swlib_scan_arg arg
;
853 if (swlib_priv_init() < 0)
860 swlib_call(SWITCH_CMD_GET_SWITCH
, add_switch
, NULL
, &arg
);
869 swlib_free_attributes(struct switch_attr
**head
)
871 struct switch_attr
*a
= *head
;
872 struct switch_attr
*next
;
877 free(a
->description
);
885 swlib_free_port_map(struct switch_dev
*dev
)
889 if (!dev
|| !dev
->maps
)
892 for (i
= 0; i
< dev
->ports
; i
++)
893 free(dev
->maps
[i
].segment
);
898 swlib_free(struct switch_dev
*dev
)
900 swlib_free_attributes(&dev
->ops
);
901 swlib_free_attributes(&dev
->port_ops
);
902 swlib_free_attributes(&dev
->vlan_ops
);
903 swlib_free_port_map(dev
);
913 swlib_free_all(struct switch_dev
*dev
)
915 struct switch_dev
*p
;