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zebra: Notify daemons about SIDs

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Send asynchronous notifications to zclients when an SRv6 SID is
allocated/released and when a SID alloc/release operation fails.

Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>
This commit is contained in:
Carmine Scarpitta 2024-05-02 13:39:49 +02:00
parent b90cb00974
commit efa830e89c
3 changed files with 60 additions and 0 deletions
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33
zebra/zapi_msg.c
View File

@ -999,6 +999,39 @@ void zsend_neighbor_notify(int cmd, struct interface *ifp,
}
}
void zsend_srv6_sid_notify(struct zserv *client, const struct srv6_sid_ctx *ctx,
struct in6_addr *sid_value, uint32_t func,
uint32_t wide_func, enum zapi_srv6_sid_notify note)
{
struct stream *s;
uint16_t cmd = ZEBRA_SRV6_SID_NOTIFY;
char buf[256];
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("%s: notifying %s ctx %s sid %pI6 note %s (proto=%u, instance=%u, sessionId=%u)",
__func__, zserv_command_string(cmd),
srv6_sid_ctx2str(buf, sizeof(buf), ctx), sid_value,
zapi_srv6_sid_notify2str(note), client->proto,
client->instance, client->session_id);
s = stream_new(ZEBRA_MAX_PACKET_SIZ);
zclient_create_header(s, cmd, VRF_DEFAULT);
/* Notification type (e.g. ZAPI_SRV6_SID_ALLOCATED, ZAPI_SRV6_SID_FAIL_ALLOC, ...) */
stream_put(s, &note, sizeof(note));
/* Context associated with the SRv6 SID */
stream_put(s, ctx, sizeof(struct srv6_sid_ctx));
/* SRv6 SID value (i.e. IPv6 address) */
stream_put(s, sid_value, sizeof(struct in6_addr));
/* SRv6 SID function */
stream_putl(s, func);
/* SRv6 wide SID function */
stream_putl(s, wide_func);
stream_putw_at(s, 0, stream_get_endp(s));
zserv_send_message(client, s);
}
/* Router-id is updated. Send ZEBRA_ROUTER_ID_UPDATE to client. */
int zsend_router_id_update(struct zserv *client, afi_t afi, struct prefix *p,

5
zebra/zapi_msg.h
View File

@ -94,6 +94,11 @@ extern int zsend_sr_policy_notify_status(uint32_t color,
extern void zsend_neighbor_notify(int cmd, struct interface *ifp,
struct ipaddr *ipaddr, int ndm_state,
union sockunion *link_layer_ipv4, int ip_len);
extern void zsend_srv6_sid_notify(struct zserv *client,
const struct srv6_sid_ctx *ctx,
struct in6_addr *sid_value, uint32_t func,
uint32_t wide_func,
enum zapi_srv6_sid_notify note);
extern int zsend_client_close_notify(struct zserv *client,
struct zserv *closed_client);

22
zebra/zebra_srv6.c
View File

@ -2279,6 +2279,8 @@ static int srv6_manager_get_sid_internal(struct zebra_srv6_sid **sid,
const char *locator_name)
{
int ret = -1;
struct listnode *node;
struct zserv *c;
char buf[256];
if (IS_ZEBRA_DEBUG_PACKET)
@ -2291,6 +2293,10 @@ static int srv6_manager_get_sid_internal(struct zebra_srv6_sid **sid,
zlog_warn("%s: not got SRv6 SID for ctx %s, sid_value=%pI6, locator_name=%s",
__func__, srv6_sid_ctx2str(buf, sizeof(buf), ctx),
sid_value, locator_name);
/* Notify client about SID alloc failure */
zsend_srv6_sid_notify(client, ctx, NULL, 0, 0,
ZAPI_SRV6_SID_FAIL_ALLOC);
} else if (ret == 0) {
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("%s: got existing SRv6 SID for ctx %s: sid_value=%pI6 (func=%u) (proto=%u, instance=%u, sessionId=%u), notify client",
@ -2300,6 +2306,10 @@ static int srv6_manager_get_sid_internal(struct zebra_srv6_sid **sid,
client->instance, client->session_id);
if (!listnode_lookup((*sid)->client_list, client))
listnode_add((*sid)->client_list, client);
zsend_srv6_sid_notify(client, ctx, &(*sid)->value, (*sid)->func,
(*sid)->wide_func,
ZAPI_SRV6_SID_ALLOCATED);
} else {
if (IS_ZEBRA_DEBUG_PACKET)
zlog_debug("%s: got new SRv6 SID for ctx %s: sid_value=%pI6 (func=%u) (proto=%u, instance=%u, sessionId=%u), notifying all clients",
@ -2309,6 +2319,11 @@ static int srv6_manager_get_sid_internal(struct zebra_srv6_sid **sid,
client->instance, client->session_id);
if (!listnode_lookup((*sid)->client_list, client))
listnode_add((*sid)->client_list, client);
for (ALL_LIST_ELEMENTS_RO((*sid)->client_list, node, c))
zsend_srv6_sid_notify(c, ctx, &(*sid)->value,
(*sid)->func, (*sid)->wide_func,
ZAPI_SRV6_SID_ALLOCATED);
}
return ret;
@ -2382,6 +2397,13 @@ static int srv6_manager_release_sid_internal(struct zserv *client,
zlog_debug("%s: no SID associated with ctx %s", __func__,
srv6_sid_ctx2str(buf, sizeof(buf), ctx));
if (ret == 0)
zsend_srv6_sid_notify(client, ctx, NULL, 0, 0,
ZAPI_SRV6_SID_RELEASED);
else
zsend_srv6_sid_notify(client, ctx, NULL, 0, 0,
ZAPI_SRV6_SID_FAIL_RELEASE);
return ret;
}