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link: Support link grouping

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New functions:
  rtnl_link_set_group(link, group)
  rtnl_link_get_group(link)

The group identifier is printed in the brief section as "group N"

Signed-off-by: Thomas Graf <tgraf@redhat.com>
This commit is contained in:
Thomas Graf 2012-10-09 21:55:31 +02:00
parent 36139cf1f0
commit a35287a689
4 changed files with 56 additions and 1 deletions
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14
doc/route.txt
View File

@ -365,6 +365,20 @@ void rtnl_link_set_ifindex(struct rtnl_link *link, int ifindex);
int rtnl_link_get_ifindex(struct rtnl_link *link);
-----
[[link_attr_group]]
==== Group
Each link can be assigned a numeric group identifier to group a bunch of links
together and apply a set of changes to a group instead of just a single link.
[source,c]
-----
#include <netlink/route/link.h>
void rtnl_link_set_group(struct rtnl_link *link, uint32_t group);
uint32_t rtnl_link_get_group(struct rtnl_link *link);
-----
[[link_attr_address]]
==== Link Layer Address
The link layer address (e.g. MAC address).

1
include/netlink-types.h
View File

@ -176,6 +176,7 @@ struct rtnl_link
uint32_t l_promiscuity;
uint32_t l_num_tx_queues;
uint32_t l_num_rx_queues;
uint32_t l_group;
};
struct rtnl_ncacheinfo

3
include/netlink/route/link.h
View File

@ -148,6 +148,9 @@ extern char * rtnl_link_get_qdisc(struct rtnl_link *);
extern void rtnl_link_set_name(struct rtnl_link *, const char *);
extern char * rtnl_link_get_name(struct rtnl_link *);
extern void rtnl_link_set_group(struct rtnl_link *, uint32_t);
extern uint32_t rtnl_link_get_group(struct rtnl_link *);
extern void rtnl_link_set_flags(struct rtnl_link *, unsigned int);
extern void rtnl_link_unset_flags(struct rtnl_link *, unsigned int);
extern unsigned int rtnl_link_get_flags(struct rtnl_link *);

39
lib/route/link.c
View File

@ -52,6 +52,7 @@
#define LINK_ATTR_PROMISCUITY (1 << 21)
#define LINK_ATTR_NUM_TX_QUEUES (1 << 22)
#define LINK_ATTR_NUM_RX_QUEUES (1 << 23)
#define LINK_ATTR_GROUP (1 << 24)
static struct nl_cache_ops rtnl_link_ops;
static struct nl_object_ops link_obj_ops;
@ -260,6 +261,7 @@ static struct nla_policy link_policy[IFLA_MAX+1] = {
[IFLA_PROMISCUITY] = { .type = NLA_U32 },
[IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 },
[IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 },
[IFLA_GROUP] = { .type = NLA_U32 },
};
static struct nla_policy link_info_policy[IFLA_INFO_MAX+1] = {
@ -554,7 +556,12 @@ static int link_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
if (tb[IFLA_NUM_RX_QUEUES]) {
link->l_num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]);
link->ce_mask |= LINK_ATTR_NUM_RX_QUEUES;
};
}
if (tb[IFLA_GROUP]) {
link->l_group = nla_get_u32(tb[IFLA_GROUP]);
link->ce_mask |= LINK_ATTR_GROUP;
}
err = pp->pp_cb((struct nl_object *) link, pp);
errout:
@ -613,6 +620,9 @@ static void link_dump_line(struct nl_object *obj, struct nl_dump_params *p)
rtnl_link_put(ll);
}
if (link->ce_mask & LINK_ATTR_GROUP)
nl_dump(p, "group %u ", link->l_group);
if (link->l_info_ops && link->l_info_ops->io_dump[NL_DUMP_LINE])
link->l_info_ops->io_dump[NL_DUMP_LINE](link, p);
@ -816,6 +826,7 @@ static int link_compare(struct nl_object *_a, struct nl_object *_b,
diff |= LINK_DIFF(PROMISCUITY, a->l_promiscuity != b->l_promiscuity);
diff |= LINK_DIFF(NUM_TX_QUEUES,a->l_num_tx_queues != b->l_num_tx_queues);
diff |= LINK_DIFF(NUM_RX_QUEUES,a->l_num_rx_queues != b->l_num_rx_queues);
diff |= LINK_DIFF(GROUP, a->l_group != b->l_group);
if (flags & LOOSE_COMPARISON)
diff |= LINK_DIFF(FLAGS,
@ -852,6 +863,7 @@ static const struct trans_tbl link_attrs[] = {
__ADD(LINK_ATTR_PROMISCUITY, promiscuity)
__ADD(LINK_ATTR_NUM_TX_QUEUES, num_tx_queues)
__ADD(LINK_ATTR_NUM_RX_QUEUES, num_rx_queues)
__ADD(LINK_ATTR_GROUP, group)
};
static char *link_attrs2str(int attrs, char *buf, size_t len)
@ -1170,6 +1182,9 @@ static int build_link_msg(int cmd, struct ifinfomsg *hdr,
if (link->ce_mask & LINK_ATTR_NUM_RX_QUEUES)
NLA_PUT_U32(msg, IFLA_NUM_RX_QUEUES, link->l_num_rx_queues);
if (link->ce_mask & LINK_ATTR_GROUP)
NLA_PUT_U32(msg, IFLA_GROUP, link->l_group);
if (link->ce_mask & LINK_ATTR_LINKINFO) {
struct nlattr *info;
@ -1523,6 +1538,28 @@ char *rtnl_link_get_name(struct rtnl_link *link)
return link->ce_mask & LINK_ATTR_IFNAME ? link->l_name : NULL;
}
/**
* Set the group identifier of a link object
* @arg link Link object
* @arg group Group identifier
*/
void rtnl_link_set_group(struct rtnl_link *link, uint32_t group)
{
link->l_group = group;
link->ce_mask |= LINK_ATTR_GROUP;
}
/**
* Return the group identifier of link object
* @arg link Link object
*
* @return Group identifier or 0 if not set.
*/
uint32_t rtnl_link_get_group(struct rtnl_link *link)
{
return link->l_group;
}
static inline void __assign_addr(struct rtnl_link *link, struct nl_addr **pos,
struct nl_addr *new, int flag)
{