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ip: nexthop: add a helper which retrieves and prints cached nh entry 

Add a helper which looks for a nexthop in the cache and if not found
reads the entry from the kernel and caches it. Finally the entry is
printed.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
This commit is contained in:
Nikolay Aleksandrov 2021-09-30 14:38:42 +03:00 committed by David Ahern
parent 60a9703032
commit cb3d18c29e
2 changed files with 19 additions and 0 deletions
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16
ip/ipnexthop.c
View File

@ -602,6 +602,22 @@ static void ipnh_cache_del(struct nh_entry *nhe)
free(nhe); free(nhe);
} }
void print_cache_nexthop_id(FILE *fp, const char *fp_prefix, const char *jsobj,
__u32 nh_id)
{
struct nh_entry *nhe = ipnh_cache_get(nh_id);
if (!nhe) {
nhe = ipnh_cache_add(nh_id);
if (!nhe)
return;
}
if (fp_prefix)
print_string(PRINT_FP, NULL, "%s", fp_prefix);
__print_nexthop_entry(fp, jsobj, nhe, false);
}
int print_nexthop(struct nlmsghdr *n, void *arg) int print_nexthop(struct nlmsghdr *n, void *arg)
{ {
struct nhmsg *nhm = NLMSG_DATA(n); struct nhmsg *nhm = NLMSG_DATA(n);

3
ip/nh_common.h
View File

@ -46,4 +46,7 @@ struct nh_entry {
struct nexthop_grp *nh_groups; struct nexthop_grp *nh_groups;
}; };
void print_cache_nexthop_id(FILE *fp, const char *fp_prefix, const char *jsobj,
__u32 nh_id);
#endif /* __NH_COMMON_H__ */ #endif /* __NH_COMMON_H__ */