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idiag: add a oo_compare() function for idiag_msg objects

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Having a oo_keygen() function only makes sense together with a
oo_compare() function because after hashing, you still have to compare
the objects for equality (in case of hash collission).

Fixes: 9c066b9271493ce3efff0b9d7b6e424990bba3f2
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Thomas Haller 2014-11-24 17:14:57 +01:00
parent 8eea9e927f
commit fac840d1f3
1 changed files with 17 additions and 0 deletions
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17
lib/idiag/idiag_msg_obj.c
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@ -851,6 +851,22 @@ static char *_idiagnl_attrs2str(int attrs, char *buf, size_t len)
ARRAY_SIZE(idiagnl_attrs));
}
static int idiagnl_compare(struct nl_object *_a, struct nl_object *_b,
uint32_t attrs, int flags)
{
struct idiagnl_msg *a = (struct idiagnl_msg *) _a;
struct idiagnl_msg *b = (struct idiagnl_msg *) _b;
int diff = 0;
#define _DIFF(ATTR, EXPR) ATTR_DIFF(attrs, IDIAGNL_ATTR_##ATTR, a, b, EXPR)
diff |= _DIFF(FAMILY, a->idiag_family != b->idiag_family);
diff |= _DIFF(STATE, a->idiag_state != b->idiag_state);
diff |= _DIFF(SPORT, a->idiag_sport != b->idiag_sport);
diff |= _DIFF(DPORT, a->idiag_dport != b->idiag_dport);
#undef _DIFF
return diff;
}
static void idiagnl_keygen(struct nl_object *obj, uint32_t *hashkey,
uint32_t table_sz)
{
@ -888,6 +904,7 @@ struct nl_object_ops idiagnl_msg_obj_ops = {
[NL_DUMP_DETAILS] = idiag_msg_dump_details,
[NL_DUMP_STATS] = idiag_msg_dump_stats,
},
.oo_compare = idiagnl_compare,
.oo_keygen = idiagnl_keygen,
.oo_attrs2str = _idiagnl_attrs2str,
.oo_id_attrs = (IDIAGNL_ATTR_FAMILY |