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Netlink: Use linpool instead of static buffer

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This commit is contained in:
Ondrej Zajicek (work) 2017-12-13 15:26:29 +01:00
parent 772beb7308
commit 3e7923507b
1 changed files with 5 additions and 34 deletions
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39
sysdep/linux/netlink.c
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@ -645,13 +645,8 @@ nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct nexthop *nh, int af)
}
static struct nexthop *
nl_parse_multipath(struct krt_proto *p, struct rtattr *ra, int af)
nl_parse_multipath(struct nl_parse_state *s, struct krt_proto *p, struct rtattr *ra, int af)
{
/* Temporary buffer for multicast nexthops */
static struct nexthop *nh_buffer;
static int nh_buf_size; /* in number of structures */
static int nh_buf_used;
struct rtattr *a[BIRD_RTA_MAX];
struct rtnexthop *nh = RTA_DATA(ra);
struct nexthop *rv, *first, **last;
@ -659,7 +654,6 @@ nl_parse_multipath(struct krt_proto *p, struct rtattr *ra, int af)
first = NULL;
last = &first;
nh_buf_used = 0;
while (len)
{
@ -667,18 +661,9 @@ nl_parse_multipath(struct krt_proto *p, struct rtattr *ra, int af)
if ((len < sizeof(*nh)) || (len < nh->rtnh_len))
return NULL;
if (nh_buf_used == nh_buf_size)
{
nh_buf_size = nh_buf_size ? (nh_buf_size * 2) : 4;
nh_buffer = xrealloc(nh_buffer, nh_buf_size * NEXTHOP_MAX_SIZE);
}
/* FIXME: This is really ugly */
*last = rv = (void *) (((byte *) nh_buffer) + (nh_buf_used++ * NEXTHOP_MAX_SIZE));
memset(rv, 0, NEXTHOP_MAX_SIZE);
// rv->next = NULL;
*last = rv = lp_allocz(s->pool, NEXTHOP_MAX_SIZE);
last = &(rv->next);
rv->flags = 0;
rv->weight = nh->rtnh_hops;
rv->iface = if_find_by_index(nh->rtnh_ifindex);
if (!rv->iface)
@ -1395,20 +1380,6 @@ krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list
n->n.flags &= ~KRF_SYNC_ERROR;
}
static inline struct nexthop *
nl_alloc_nexthop(struct nl_parse_state *s, ip_addr gw, struct iface *iface, byte weight)
{
struct nexthop *nh = lp_alloc(s->pool, sizeof(struct nexthop));
nh->gw = gw;
nh->iface = iface;
nh->next = NULL;
nh->weight = weight;
return nh;
}
static int
nl_mergable_route(struct nl_parse_state *s, net *net, struct krt_proto *p, uint priority, uint krt_type)
{
@ -1597,7 +1568,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
if (a[RTA_MULTIPATH])
{
struct nexthop *nh = nl_parse_multipath(p, a[RTA_MULTIPATH], i->rtm_family);
struct nexthop *nh = nl_parse_multipath(s, p, a[RTA_MULTIPATH], i->rtm_family);
if (!nh)
{
log(L_ERR "KRT: Received strange multipath route %N", net->n.addr);
@ -1784,8 +1755,8 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
* Ideally, now we would send the received route to the rest of kernel code.
* But IPv6 ECMP routes before 4.11 are sent as a sequence of routes, so we
* postpone it and merge next hops until the end of the sequence. Note that
* proper multipath updates are rejected by nl_mergable_route(), so it is
* always the first case for them.
* when doing merging of next hops, we expect the new route to be unipath.
* Otherwise, we ignore additional next hops in nexthop_insert().
*/
if (!s->net)