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d0660f0b3b
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>
34 lines
1.3 KiB
C
34 lines
1.3 KiB
C
/*
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* DNS Resolver upcall management for CIFS DFS and AFS
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* Handles host name to IP address resolution and DNS query for AFSDB RR.
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*
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* Copyright (c) International Business Machines Corp., 2008
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* Author(s): Steve French (sfrench@us.ibm.com)
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* Wang Lei (wang840925@gmail.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LINUX_DNS_RESOLVER_H
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#define _LINUX_DNS_RESOLVER_H
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#include <uapi/linux/dns_resolver.h>
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extern int dns_query(const char *type, const char *name, size_t namelen,
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const char *options, char **_result, time64_t *_expiry,
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bool invalidate);
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#endif /* _LINUX_DNS_RESOLVER_H */
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