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[PATCH] keys: sort out key quota system

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Add the ability for key creation to overrun the user's quota in some
circumstances - notably when a session keyring is created and assigned to a
process that didn't previously have one.

This means it's still possible to log in, should PAM require the creation of a
new session keyring, and fix an overburdened key quota.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
David Howells 2006-06-26 00:24:50 -07:00 • committed by Linus Torvalds
parent f116629d03
commit 7e047ef5fe
11 changed files with 85 additions and 51 deletions
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13
include/linux/key.h
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@ -248,7 +248,14 @@ extern struct key *key_alloc(struct key_type *type,
const char *desc,
uid_t uid, gid_t gid,
struct task_struct *ctx,
key_perm_t perm, int not_in_quota);
key_perm_t perm,
unsigned long flags);
#define KEY_ALLOC_IN_QUOTA 0x0000 /* add to quota, reject if would overrun */
#define KEY_ALLOC_QUOTA_OVERRUN 0x0001 /* add to quota, permit even if overrun */
#define KEY_ALLOC_NOT_IN_QUOTA 0x0002 /* not in quota */
extern int key_payload_reserve(struct key *key, size_t datalen);
extern int key_instantiate_and_link(struct key *key,
const void *data,
@ -285,7 +292,7 @@ extern key_ref_t key_create_or_update(key_ref_t keyring,
const char *description,
const void *payload,
size_t plen,
int not_in_quota);
unsigned long flags);
extern int key_update(key_ref_t key,
const void *payload,
@ -299,7 +306,7 @@ extern int key_unlink(struct key *keyring,
extern struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
struct task_struct *ctx,
int not_in_quota,
unsigned long flags,
struct key *dest);
extern int keyring_clear(struct key *keyring);