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[PATCH] Keys: Allow in-kernel key requestor to pass auxiliary data to upcaller

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The proposed NFS key type uses its own method of passing key requests to
userspace (upcalling) rather than invoking /sbin/request-key.  This is
because the responsible userspace daemon should already be running and will
be contacted through rpc_pipefs.

This patch permits the NFS filesystem to pass auxiliary data to the upcall
operation (struct key_type::request_key) so that the upcaller can use a
pre-existing communications channel more easily.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-By: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Howells 2006-06-29 02:24:28 -07:00 • committed by Linus Torvalds
commit 4e54f08543
6 changed files with 108 additions and 30 deletions
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8
include/linux/key.h
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@ -177,7 +177,8 @@ struct key {
/*
* kernel managed key type definition
*/
typedef int (*request_key_actor_t)(struct key *key, struct key *authkey, const char *op);
typedef int (*request_key_actor_t)(struct key *key, struct key *authkey,
const char *op, void *aux);
struct key_type {
/* name of the type */
@ -285,6 +286,11 @@ extern struct key *request_key(struct key_type *type,
const char *description,
const char *callout_info);
extern struct key *request_key_with_auxdata(struct key_type *type,
const char *description,
const char *callout_info,
void *aux);
extern int key_validate(struct key *key);
extern key_ref_t key_create_or_update(key_ref_t keyring,