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isisd: Add func to unset the SRv6 locator

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Add a function to unset the SRv6 locator for a specific IS-IS area.

This function calls `isis_zebra_srv6_manager_release_locator_chunk()` to
ask zebra to release the locator chunk owned by IS-IS and removes the
chunk from the area's chunks list.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
This commit is contained in:
Carmine Scarpitta 2023-03-10 23:50:46 +01:00
parent d223a8167e
commit f49937e340
2 changed files with 51 additions and 0 deletions
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49
isisd/isis_srv6.c
View file

@ -15,6 +15,55 @@
#include "isisd/isisd.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_srv6.h"
#include "isisd/isis_zebra.h"
/**
* Unset the SRv6 locator for a given IS-IS area.
*
* @param area IS-IS area
*
* @result True on success, False otherwise
*/
bool isis_srv6_locator_unset(struct isis_area *area)
{
int ret;
struct listnode *node, *nnode;
struct srv6_locator_chunk *chunk;
if (strncmp(area->srv6db.config.srv6_locator_name, "",
sizeof(area->srv6db.config.srv6_locator_name)) == 0) {
sr_debug("SRv6 locator not set");
return true;
}
/* Inform Zebra that we are releasing the SRv6 locator */
ret = isis_zebra_srv6_manager_release_locator_chunk(
area->srv6db.config.srv6_locator_name);
if (ret < 0)
return false;
/* Delete chunks */
for (ALL_LIST_ELEMENTS(area->srv6db.srv6_locator_chunks, node, nnode,
chunk)) {
sr_debug(
"Releasing chunk of locator %s (prefix %pFX) for IS-IS area %s",
area->srv6db.config.srv6_locator_name, &chunk->prefix,
area->area_tag);
listnode_delete(area->srv6db.srv6_locator_chunks, chunk);
srv6_locator_chunk_free(&chunk);
}
/* Clear locator name */
memset(area->srv6db.config.srv6_locator_name, 0,
sizeof(area->srv6db.config.srv6_locator_name));
/* Regenerate LSPs to advertise that the SRv6 locator no longer exists
*/
lsp_regenerate_schedule(area, area->is_type, 0);
return true;
}
/**
* Show Segment Routing over IPv6 (SRv6) Node.

2
isisd/isis_srv6.h
View file

@ -44,6 +44,8 @@ struct isis_srv6_db {
} config;
};
bool isis_srv6_locator_unset(struct isis_area *area);
extern void isis_srv6_area_init(struct isis_area *area);
extern void isis_srv6_area_term(struct isis_area *area);