[nft PATCH v4 1/7] src: Fix cache_flush() in cache_needs_more() logic

[Phil Sutter <phil@nwl.cc>]

Commit 34a20645d54fa enabled cache updates depending on command causing
it. As a side-effect, this disabled measures in cache_flush() preventing
a later cache update. Re-establish this by setting cache->cmd in
addition to cache->genid after dropping cache entries.

While being at it, set cache->cmd in cache_release() as well. This
shouldn't be necessary since zeroing cache->genid should suffice for
cache_update(), but better be consistent (and future-proof) here.

Fixes: 34a20645d54fa ("src: update cache if cmd is more specific")
Signed-off-by: Phil Sutter <phil@nwl.cc>
---
Changes since v1:
- Adjust cache_release() as well, just to make sure.
---
 src/rule.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/rule.c b/src/rule.c
index 326edb5dd459a..966948cd7ae90 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -299,12 +299,15 @@ void cache_flush(struct nft_ctx *nft, enum cmd_ops cmd, struct list_head *msgs)
 
 	__cache_flush(&cache->list);
 	cache->genid = mnl_genid_get(&ctx);
+	cache->cmd = CMD_LIST;
 }
 
 void cache_release(struct nft_cache *cache)
 {
 	__cache_flush(&cache->list);
 	cache->genid = 0;
+	cache->cmd = CMD_INVALID;
+
 }
 
 /* internal ID to uniquely identify a set in the batch */
-- 
2.21.0