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dns_resolver: Allow used keys to be invalidated

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Allow used DNS resolver keys to be invalidated after use if the caller is
doing its own caching of the results.  This reduces the amount of resources
required.

Fix AFS to invalidate DNS results to kill off permanent failure records
that get lodged in the resolver keyring and prevent future lookups from
happening.

Fixes: 0a5143f2f8 ("afs: Implement VL server rotation")
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells
2019-05-03 18:26:55 +01:00
parent ca1cbbdce9
commit d0660f0b3b
7 changed files with 12 additions and 7 deletions
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2
fs/nfs/dns_resolve.c
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@@ -22,7 +22,7 @@ ssize_t nfs_dns_resolve_name(struct net *net, char *name, size_t namelen,
char *ip_addr = NULL;
int ip_len;
ip_len = dns_query(NULL, name, namelen, NULL, &ip_addr, NULL);
ip_len = dns_query(NULL, name, namelen, NULL, &ip_addr, NULL, false);
if (ip_len > 0)
ret = rpc_pton(net, ip_addr, ip_len, sa, salen);
else