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link: Support IFLA_NUM_VF attribute

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- parses attribute if available
- provides API to access value
    rtnl_link_get_num_vf(link, num_vf)
This commit is contained in:
Thomas Graf 2010-11-11 14:11:32 +01:00
parent 8970c5cde6
commit fd857eeb9f
3 changed files with 31 additions and 0 deletions
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1
include/netlink-types.h
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@ -168,6 +168,7 @@ struct rtnl_link
struct rtnl_link_map l_map;
uint64_t l_stats[RTNL_LINK_STATS_MAX+1];
uint32_t l_flag_mask;
uint32_t l_num_vf;
uint8_t l_operstate;
uint8_t l_linkmode;
/* 2 byte hole */

2
include/netlink/route/link.h
View file

@ -136,6 +136,8 @@ extern uint8_t rtnl_link_get_linkmode(struct rtnl_link *);
extern const char * rtnl_link_get_ifalias(struct rtnl_link *);
extern void rtnl_link_set_ifalias(struct rtnl_link *, const char *);
extern int rtnl_link_get_num_vf(struct rtnl_link *, uint32_t *);
extern uint64_t rtnl_link_get_stat(struct rtnl_link *, int);
extern int rtnl_link_set_info_type(struct rtnl_link *, const char *);

28
lib/route/link.c
View file

@ -177,6 +177,7 @@
#define LINK_ATTR_LINKMODE 0x20000
#define LINK_ATTR_LINKINFO 0x40000
#define LINK_ATTR_IFALIAS 0x80000
#define LINK_ATTR_NUM_VF 0x100000
static struct nl_cache_ops rtnl_link_ops;
static struct nl_object_ops link_obj_ops;
@ -254,6 +255,7 @@ static struct nla_policy link_policy[IFLA_MAX+1] = {
[IFLA_STATS64] = { .minlen = sizeof(struct rtnl_link_stats64) },
[IFLA_MAP] = { .minlen = sizeof(struct rtnl_link_ifmap) },
[IFLA_IFALIAS] = { .type = NLA_STRING, .maxlen = IFALIASZ },
[IFLA_NUM_VF] = { .type = NLA_U32 },
};
static struct nla_policy link_info_policy[IFLA_INFO_MAX+1] = {
@ -443,6 +445,11 @@ static int link_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
link->ce_mask |= LINK_ATTR_IFALIAS;
}
if (tb[IFLA_NUM_VF]) {
link->l_num_vf = nla_get_u32(tb[IFLA_NUM_VF]);
link->ce_mask |= LINK_ATTR_NUM_VF;
}
if (tb[IFLA_LINKINFO]) {
struct nlattr *li[IFLA_INFO_MAX+1];
@ -555,6 +562,9 @@ static void link_dump_details(struct nl_object *obj, struct nl_dump_params *p)
nl_dump(p, "state %s ", buf);
}
if (link->ce_mask & LINK_ATTR_NUM_VF)
nl_dump(p, "num-vf %u ", link->l_num_vf);
nl_dump(p, "mode %s\n",
rtnl_link_mode2str(link->l_linkmode, buf, sizeof(buf)));
@ -694,6 +704,7 @@ static int link_compare(struct nl_object *_a, struct nl_object *_b,
diff |= LINK_DIFF(ADDR, nl_addr_cmp(a->l_addr, b->l_addr));
diff |= LINK_DIFF(BRD, nl_addr_cmp(a->l_bcast, b->l_bcast));
diff |= LINK_DIFF(IFALIAS, strcmp(a->l_ifalias, b->l_ifalias));
diff |= LINK_DIFF(NUM_VF, a->l_num_vf != b->l_num_vf);
if (flags & LOOSE_COMPARISON)
diff |= LINK_DIFF(FLAGS,
@ -726,6 +737,7 @@ static struct trans_tbl link_attrs[] = {
__ADD(LINK_ATTR_OPERSTATE, operstate)
__ADD(LINK_ATTR_LINKMODE, linkmode)
__ADD(LINK_ATTR_IFALIAS, ifalias)
__ADD(LINK_ATTR_NUM_VF, num_vf)
};
static char *link_attrs2str(int attrs, char *buf, size_t len)
@ -1394,6 +1406,22 @@ void rtnl_link_set_ifalias(struct rtnl_link *link, const char *alias)
}
}
/**
* Retrieve number of PCI VFs of link
* @arg link Link object
* @arg num_vf Pointer to store number of VFs
*
* @return 0 if value is available or -NLE_OPNOTSUPP if not.
*/
int rtnl_link_get_num_vf(struct rtnl_link *link, uint32_t *num_vf)
{
if (link->ce_mask & LINK_ATTR_NUM_VF) {
*num_vf = link->l_num_vf;
return 0;
} else
return -NLE_OPNOTSUPP;
}
uint64_t rtnl_link_get_stat(struct rtnl_link *link, int id)
{
if (id < 0 || id > RTNL_LINK_STATS_MAX)