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Merge commit '225943eaea3cdd634dce8fd84547baf1bc363640' into thread-next

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This commit is contained in:
Ondrej Zajicek 2024-03-28 17:46:04 +01:00
commit d548665de8
2 changed files with 57 additions and 17 deletions
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6
doc/bird.sgml
View File

@ -3981,15 +3981,15 @@ these attributes:
<p>In Linux, there is also a plenty of obscure route attributes mostly focused
on tuning TCP performance of local connections. BIRD supports most of these
attributes, see Linux or iproute2 documentation for their meaning. Attributes
<cf/krt_lock_*/ and <cf/krt_feature_*/ have type bool, others have type int.
Supported attributes are:
<cf/krt_lock_*/ and <cf/krt_feature_*/ have type bool, <cf/krt_congctl/ has type
string, others have type int. Supported attributes are:
<cf/krt_mtu/, <cf/krt_lock_mtu/, <cf/krt_window/, <cf/krt_lock_window/,
<cf/krt_rtt/, <cf/krt_lock_rtt/, <cf/krt_rttvar/, <cf/krt_lock_rttvar/,
<cf/krt_sstresh/, <cf/krt_lock_sstresh/, <cf/krt_cwnd/, <cf/krt_lock_cwnd/,
<cf/krt_advmss/, <cf/krt_lock_advmss/, <cf/krt_reordering/, <cf/krt_lock_reordering/,
<cf/krt_hoplimit/, <cf/krt_lock_hoplimit/, <cf/krt_rto_min/, <cf/krt_lock_rto_min/,
<cf/krt_initcwnd/, <cf/krt_initrwnd/, <cf/krt_quickack/,
<cf/krt_initcwnd/, <cf/krt_initrwnd/, <cf/krt_quickack/, <cf/krt_congctl/,
<cf/krt_feature_ecn/, <cf/krt_feature_allfrag/
<sect1>Example

68
sysdep/linux/netlink.c
View File

@ -77,6 +77,10 @@ static struct ea_class ea_krt_metrics[] = {
.type = T_INT,
.format = krt_bitfield_format,
},
[RTAX_CC_ALGO] = {
.name = "krt_congctl",
.type = T_STRING,
},
#define KRT_METRIC_INT(_rtax, _name) [_rtax] = { .name = _name, .type = T_INT }
KRT_METRIC_INT(RTAX_MTU, "krt_mtu"),
KRT_METRIC_INT(RTAX_WINDOW, "krt_window"),
@ -96,7 +100,8 @@ static struct ea_class ea_krt_metrics[] = {
static const char *krt_metrics_names[KRT_METRICS_MAX] = {
NULL, "lock", "mtu", "window", "rtt", "rttvar", "sstresh", "cwnd", "advmss",
"reordering", "hoplimit", "initcwnd", "features", "rto_min", "initrwnd", "quickack"
"reordering", "hoplimit", "initcwnd", "features", "rto_min", "initrwnd", "quickack",
"congctl"
};
static const char *krt_features_names[KRT_FEATURES_MAX] = {
@ -575,6 +580,9 @@ static inline u16 rta_get_u16(struct rtattr *a)
static inline u32 rta_get_u32(struct rtattr *a)
{ return *(u32 *) RTA_DATA(a); }
static inline const char *rta_get_str(struct rtattr *a)
{ return RTA_DATA(a); }
static inline ip4_addr rta_get_ip4(struct rtattr *a)
{ return ip4_ntoh(*(ip4_addr *) RTA_DATA(a)); }
@ -665,6 +673,12 @@ nl_add_attr_u32(struct nlmsghdr *h, uint bufsize, int code, u32 data)
nl_add_attr(h, bufsize, code, &data, 4);
}
static inline void
nl_add_attr_str(struct nlmsghdr *h, unsigned bufsize, int code, const char *str)
{
nl_add_attr(h, bufsize, code, str, strlen(str) + 1);
}
static inline void
nl_add_attr_ip4(struct nlmsghdr *h, uint bufsize, int code, ip4_addr ip4)
{
@ -930,20 +944,23 @@ err:
}
static void
nl_add_metrics(struct nlmsghdr *h, uint bufsize, u32 *metrics, int max)
nl_add_metrics(struct nlmsghdr *h, uint bufsize, u32 *metrics, const char *cc_algo, int max)
{
struct rtattr *a = nl_open_attr(h, bufsize, RTA_METRICS);
int t;
for (t = 1; t < max; t++)
if (metrics[0] & (1 << t))
nl_add_attr_u32(h, bufsize, t, metrics[t]);
if (t == RTAX_CC_ALGO)
nl_add_attr_str(h, bufsize, t, cc_algo);
else
nl_add_attr_u32(h, bufsize, t, metrics[t]);
nl_close_attr(h, a);
}
static int
nl_parse_metrics(struct rtattr *hdr, u32 *metrics, int max)
nl_parse_metrics(struct rtattr *hdr, u32 *metrics, const char **cc_algo, int max)
{
struct rtattr *a = RTA_DATA(hdr);
int len = RTA_PAYLOAD(hdr);
@ -951,17 +968,31 @@ nl_parse_metrics(struct rtattr *hdr, u32 *metrics, int max)
metrics[0] = 0;
for (; RTA_OK(a, len); a = RTA_NEXT(a, len))
{
if (a->rta_type == RTA_UNSPEC)
if (a->rta_type == RTAX_UNSPEC)
continue;
if (a->rta_type >= max)
continue;
if (RTA_PAYLOAD(a) != 4)
return -1;
if (a->rta_type == RTAX_CC_ALGO)
{
*cc_algo = rta_get_str(a);
int slen = RTA_PAYLOAD(a);
metrics[0] |= 1 << a->rta_type;
metrics[a->rta_type] = rta_get_u32(a);
if (!slen || ((*cc_algo)[slen - 1] != 0))
return -1;
metrics[0] |= 1 << a->rta_type;
metrics[a->rta_type] = 0;
}
else
{
if (RTA_PAYLOAD(a) != 4)
return -1;
metrics[0] |= 1 << a->rta_type;
metrics[a->rta_type] = rta_get_u32(a);
}
}
if (len > 0)
@ -1495,6 +1526,7 @@ nl_send_route(struct krt_proto *p, const rte *e, int op)
u32 metrics[KRT_METRICS_MAX];
const char *cc_algo = NULL;
metrics[0] = 0;
struct ea_walk_state ews = { .eattrs = eattrs };
@ -1502,11 +1534,15 @@ nl_send_route(struct krt_proto *p, const rte *e, int op)
{
int id = ea->id - ea_krt_metrics[0].id;
metrics[0] |= 1 << id;
metrics[id] = ea->u.data;
if (id == RTAX_CC_ALGO)
cc_algo = ea->u.ptr->data;
else
metrics[id] = ea->u.data;
}
if (metrics[0])
nl_add_metrics(&r->h, rsize, metrics, KRT_METRICS_MAX);
nl_add_metrics(&r->h, rsize, metrics, cc_algo, KRT_METRICS_MAX);
switch (dest)
{
@ -1868,7 +1904,9 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
if (a[RTA_METRICS])
{
u32 metrics[KRT_METRICS_MAX];
if (nl_parse_metrics(a[RTA_METRICS], metrics, ARRAY_SIZE(metrics)) < 0)
const char *cc_algo = NULL;
if (nl_parse_metrics(a[RTA_METRICS], metrics, &cc_algo, ARRAY_SIZE(metrics)) < 0)
{
log(L_ERR "KRT: Received route %N with strange RTA_METRICS attribute", net);
return;
@ -1876,8 +1914,10 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
for (uint t = 1; t < KRT_METRICS_MAX; t++)
if (metrics[0] & (1 << t))
ea_set_attr(&ra,
EA_LITERAL_EMBEDDED(&ea_krt_metrics[t], 0, metrics[t]));
if (t == RTAX_CC_ALGO)
ea_set_attr(&ra, EA_LITERAL_STORE_ADATA(&ea_krt_metrics[t], 0, cc_algo, strlen(cc_algo)));
else
ea_set_attr(&ra, EA_LITERAL_EMBEDDED(&ea_krt_metrics[t], 0, metrics[t]));
}
rte e0 = {