projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* internal.h: authentication token and access key management internal defs |
| 2 | * | |
| 3 | * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the License, or (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #ifndef _INTERNAL_H | |
| 13 | #define _INTERNAL_H | |
| 14 | ||
| 15 | #include <linux/key.h> | |
| 16 | #include <linux/key-ui.h> | |
| 17 | ||
| 18 | extern struct key_type key_type_dead; | |
| 19 | extern struct key_type key_type_user; | |
| 20 | ||
| 21 | /*****************************************************************************/ | |
| 22 | /* | |
| 23 | * keep track of keys for a user | |
| 24 | * - this needs to be separate to user_struct to avoid a refcount-loop | |
| 25 | * (user_struct pins some keyrings which pin this struct) | |
| 26 | * - this also keeps track of keys under request from userspace for this UID | |
| 27 | */ | |
| 28 | struct key_user { | |
| 29 | struct rb_node node; | |
| 30 | struct list_head consq; /* construction queue */ | |
| 31 | spinlock_t lock; | |
| 32 | atomic_t usage; /* for accessing qnkeys & qnbytes */ | |
| 33 | atomic_t nkeys; /* number of keys */ | |
| 34 | atomic_t nikeys; /* number of instantiated keys */ | |
| 35 | uid_t uid; | |
| 36 | int qnkeys; /* number of keys allocated to this user */ | |
| 37 | int qnbytes; /* number of bytes allocated to this user */ | |
| 38 | }; | |
| 39 | ||
| 40 | #define KEYQUOTA_MAX_KEYS 100 | |
| 41 | #define KEYQUOTA_MAX_BYTES 10000 | |
| 42 | #define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */ | |
| 43 | ||
| 44 | extern struct rb_root key_user_tree; | |
| 45 | extern spinlock_t key_user_lock; | |
| 46 | extern struct key_user root_key_user; | |
| 47 | ||
| 48 | extern struct key_user *key_user_lookup(uid_t uid); | |
| 49 | extern void key_user_put(struct key_user *user); | |
| 50 | ||
| 51 | ||
| 52 | ||
| 53 | extern struct rb_root key_serial_tree; | |
| 54 | extern spinlock_t key_serial_lock; | |
| 55 | extern struct semaphore key_alloc_sem; | |
| 56 | extern struct rw_semaphore key_construction_sem; | |
| 57 | extern wait_queue_head_t request_key_conswq; | |
| 58 | ||
| 59 | ||
| 60 | extern void keyring_publish_name(struct key *keyring); | |
| 61 | ||
| 62 | extern int __key_link(struct key *keyring, struct key *key); | |
| 63 | ||
| 64 | extern struct key *__keyring_search_one(struct key *keyring, | |
| 65 | const struct key_type *type, | |
| 66 | const char *description, | |
| 67 | key_perm_t perm); | |
| 68 | ||
| 69 | typedef int (*key_match_func_t)(const struct key *, const void *); | |
| 70 | ||
| 71 | extern struct key *keyring_search_aux(struct key *keyring, | |
| 72 | struct key_type *type, | |
| 73 | const void *description, | |
| 74 | key_match_func_t match); | |
| 75 | ||
| 76 | extern struct key *search_process_keyrings_aux(struct key_type *type, | |
| 77 | const void *description, | |
| 78 | key_match_func_t match); | |
| 79 | ||
| 80 | extern struct key *find_keyring_by_name(const char *name, key_serial_t bound); | |
| 81 | ||
| 82 | extern int install_thread_keyring(struct task_struct *tsk); | |
| 83 | ||
| 84 | /* | |
| 85 | * keyctl functions | |
| 86 | */ | |
| 87 | extern long keyctl_get_keyring_ID(key_serial_t, int); | |
| 88 | extern long keyctl_join_session_keyring(const char __user *); | |
| 89 | extern long keyctl_update_key(key_serial_t, const void __user *, size_t); | |
| 90 | extern long keyctl_revoke_key(key_serial_t); | |
| 91 | extern long keyctl_keyring_clear(key_serial_t); | |
| 92 | extern long keyctl_keyring_link(key_serial_t, key_serial_t); | |
| 93 | extern long keyctl_keyring_unlink(key_serial_t, key_serial_t); | |
| 94 | extern long keyctl_describe_key(key_serial_t, char __user *, size_t); | |
| 95 | extern long keyctl_keyring_search(key_serial_t, const char __user *, | |
| 96 | const char __user *, key_serial_t); | |
| 97 | extern long keyctl_read_key(key_serial_t, char __user *, size_t); | |
| 98 | extern long keyctl_chown_key(key_serial_t, uid_t, gid_t); | |
| 99 | extern long keyctl_setperm_key(key_serial_t, key_perm_t); | |
| 100 | extern long keyctl_instantiate_key(key_serial_t, const void __user *, | |
| 101 | size_t, key_serial_t); | |
| 102 | extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t); | |
| 103 | ||
| 104 | ||
| 105 | /* | |
| 106 | * debugging key validation | |
| 107 | */ | |
| 108 | #ifdef KEY_DEBUGGING | |
| 109 | extern void __key_check(const struct key *); | |
| 110 | ||
| 111 | static inline void key_check(const struct key *key) | |
| 112 | { | |
| 113 | if (key && (IS_ERR(key) || key->magic != KEY_DEBUG_MAGIC)) | |
| 114 | __key_check(key); | |
| 115 | } | |
| 116 | ||
| 117 | #else | |
| 118 | ||
| 119 | #define key_check(key) do {} while(0) | |
| 120 | ||
| 121 | #endif | |
| 122 | ||
| 123 | #endif /* _INTERNAL_H */ |