From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- security/keys/internal.h | 123 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 security/keys/internal.h (limited to 'security/keys/internal.h') diff --git a/security/keys/internal.h b/security/keys/internal.h new file mode 100644 index 00000000000..67b2b93a748 --- /dev/null +++ b/security/keys/internal.h @@ -0,0 +1,123 @@ +/* internal.h: authentication token and access key management internal defs + * + * Copyright (C) 2003 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 _INTERNAL_H +#define _INTERNAL_H + +#include +#include + +extern struct key_type key_type_dead; +extern struct key_type key_type_user; + +/*****************************************************************************/ +/* + * keep track of keys for a user + * - this needs to be separate to user_struct to avoid a refcount-loop + * (user_struct pins some keyrings which pin this struct) + * - this also keeps track of keys under request from userspace for this UID + */ +struct key_user { + struct rb_node node; + struct list_head consq; /* construction queue */ + spinlock_t lock; + atomic_t usage; /* for accessing qnkeys & qnbytes */ + atomic_t nkeys; /* number of keys */ + atomic_t nikeys; /* number of instantiated keys */ + uid_t uid; + int qnkeys; /* number of keys allocated to this user */ + int qnbytes; /* number of bytes allocated to this user */ +}; + +#define KEYQUOTA_MAX_KEYS 100 +#define KEYQUOTA_MAX_BYTES 10000 +#define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */ + +extern struct rb_root key_user_tree; +extern spinlock_t key_user_lock; +extern struct key_user root_key_user; + +extern struct key_user *key_user_lookup(uid_t uid); +extern void key_user_put(struct key_user *user); + + + +extern struct rb_root key_serial_tree; +extern spinlock_t key_serial_lock; +extern struct semaphore key_alloc_sem; +extern struct rw_semaphore key_construction_sem; +extern wait_queue_head_t request_key_conswq; + + +extern void keyring_publish_name(struct key *keyring); + +extern int __key_link(struct key *keyring, struct key *key); + +extern struct key *__keyring_search_one(struct key *keyring, + const struct key_type *type, + const char *description, + key_perm_t perm); + +typedef int (*key_match_func_t)(const struct key *, const void *); + +extern struct key *keyring_search_aux(struct key *keyring, + struct key_type *type, + const void *description, + key_match_func_t match); + +extern struct key *search_process_keyrings_aux(struct key_type *type, + const void *description, + key_match_func_t match); + +extern struct key *find_keyring_by_name(const char *name, key_serial_t bound); + +extern int install_thread_keyring(struct task_struct *tsk); + +/* + * keyctl functions + */ +extern long keyctl_get_keyring_ID(key_serial_t, int); +extern long keyctl_join_session_keyring(const char __user *); +extern long keyctl_update_key(key_serial_t, const void __user *, size_t); +extern long keyctl_revoke_key(key_serial_t); +extern long keyctl_keyring_clear(key_serial_t); +extern long keyctl_keyring_link(key_serial_t, key_serial_t); +extern long keyctl_keyring_unlink(key_serial_t, key_serial_t); +extern long keyctl_describe_key(key_serial_t, char __user *, size_t); +extern long keyctl_keyring_search(key_serial_t, const char __user *, + const char __user *, key_serial_t); +extern long keyctl_read_key(key_serial_t, char __user *, size_t); +extern long keyctl_chown_key(key_serial_t, uid_t, gid_t); +extern long keyctl_setperm_key(key_serial_t, key_perm_t); +extern long keyctl_instantiate_key(key_serial_t, const void __user *, + size_t, key_serial_t); +extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t); + + +/* + * debugging key validation + */ +#ifdef KEY_DEBUGGING +extern void __key_check(const struct key *); + +static inline void key_check(const struct key *key) +{ + if (key && (IS_ERR(key) || key->magic != KEY_DEBUG_MAGIC)) + __key_check(key); +} + +#else + +#define key_check(key) do {} while(0) + +#endif + +#endif /* _INTERNAL_H */ -- cgit v1.2.3