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;