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| author | David Howells <dhowells@redhat.com> | 2013-09-24 10:35:18 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2013-09-24 10:35:18 +0100 |
| commit | ab3c3587f8cda9083209a61dbe3a4407d3cada10 (patch) | |
| tree | c479efb4b7a834ee5d3b74d81560a2214c463431 /include | |
| parent | b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 (diff) | |
| download | linux-stable-ab3c3587f8cda9083209a61dbe3a4407d3cada10.tar.gz linux-stable-ab3c3587f8cda9083209a61dbe3a4407d3cada10.tar.bz2 linux-stable-ab3c3587f8cda9083209a61dbe3a4407d3cada10.zip | |
KEYS: Implement a big key type that can save to tmpfs
Implement a big key type that can save its contents to tmpfs and thus
swapspace when memory is tight. This is useful for Kerberos ticket caches.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Simo Sorce <simo@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/keys/big_key-type.h | 25 | ||||
| -rw-r--r-- | include/linux/key.h | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/include/keys/big_key-type.h b/include/keys/big_key-type.h new file mode 100644 index 000000000000..d69bc8af3292 --- /dev/null +++ b/include/keys/big_key-type.h @@ -0,0 +1,25 @@ +/* Big capacity key type. + * + * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _KEYS_BIG_KEY_TYPE_H +#define _KEYS_BIG_KEY_TYPE_H + +#include <linux/key-type.h> + +extern struct key_type key_type_big_key; + +extern int big_key_instantiate(struct key *key, struct key_preparsed_payload *prep); +extern void big_key_revoke(struct key *key); +extern void big_key_destroy(struct key *key); +extern void big_key_describe(const struct key *big_key, struct seq_file *m); +extern long big_key_read(const struct key *key, char __user *buffer, size_t buflen); + +#endif /* _KEYS_BIG_KEY_TYPE_H */ diff --git a/include/linux/key.h b/include/linux/key.h index 2417f789d29b..010dbb618aca 100644 --- a/include/linux/key.h +++ b/include/linux/key.h @@ -201,6 +201,7 @@ struct key { unsigned long value; void __rcu *rcudata; void *data; + void *data2[2]; } payload; struct assoc_array keys; }; |