libceph: set global_id as soon as we get an auth ticket
[linux-2.6-microblaze.git] / include / linux / ceph / auth.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _FS_CEPH_AUTH_H
3 #define _FS_CEPH_AUTH_H
4
5 #include <linux/ceph/types.h>
6 #include <linux/ceph/buffer.h>
7
8 /*
9  * Abstract interface for communicating with the authenticate module.
10  * There is some handshake that takes place between us and the monitor
11  * to acquire the necessary keys.  These are used to generate an
12  * 'authorizer' that we use when connecting to a service (mds, osd).
13  */
14
15 struct ceph_auth_client;
16 struct ceph_msg;
17
18 struct ceph_authorizer {
19         void (*destroy)(struct ceph_authorizer *);
20 };
21
22 struct ceph_auth_handshake {
23         struct ceph_authorizer *authorizer;
24         void *authorizer_buf;
25         size_t authorizer_buf_len;
26         void *authorizer_reply_buf;
27         size_t authorizer_reply_buf_len;
28         int (*sign_message)(struct ceph_auth_handshake *auth,
29                             struct ceph_msg *msg);
30         int (*check_message_signature)(struct ceph_auth_handshake *auth,
31                                        struct ceph_msg *msg);
32 };
33
34 struct ceph_auth_client_ops {
35         /*
36          * true if we are authenticated and can connect to
37          * services.
38          */
39         int (*is_authenticated)(struct ceph_auth_client *ac);
40
41         /*
42          * true if we should (re)authenticate, e.g., when our tickets
43          * are getting old and crusty.
44          */
45         int (*should_authenticate)(struct ceph_auth_client *ac);
46
47         /*
48          * build requests and process replies during monitor
49          * handshake.  if handle_reply returns -EAGAIN, we build
50          * another request.
51          */
52         int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end);
53         int (*handle_reply)(struct ceph_auth_client *ac, u64 global_id,
54                             void *buf, void *end, u8 *session_key,
55                             int *session_key_len, u8 *con_secret,
56                             int *con_secret_len);
57
58         /*
59          * Create authorizer for connecting to a service, and verify
60          * the response to authenticate the service.
61          */
62         int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type,
63                                  struct ceph_auth_handshake *auth);
64         /* ensure that an existing authorizer is up to date */
65         int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type,
66                                  struct ceph_auth_handshake *auth);
67         int (*add_authorizer_challenge)(struct ceph_auth_client *ac,
68                                         struct ceph_authorizer *a,
69                                         void *challenge_buf,
70                                         int challenge_buf_len);
71         int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
72                                        struct ceph_authorizer *a,
73                                        void *reply, int reply_len,
74                                        u8 *session_key, int *session_key_len,
75                                        u8 *con_secret, int *con_secret_len);
76         void (*invalidate_authorizer)(struct ceph_auth_client *ac,
77                                       int peer_type);
78
79         /* reset when we (re)connect to a monitor */
80         void (*reset)(struct ceph_auth_client *ac);
81
82         void (*destroy)(struct ceph_auth_client *ac);
83
84         int (*sign_message)(struct ceph_auth_handshake *auth,
85                             struct ceph_msg *msg);
86         int (*check_message_signature)(struct ceph_auth_handshake *auth,
87                                        struct ceph_msg *msg);
88 };
89
90 struct ceph_auth_client {
91         u32 protocol;           /* CEPH_AUTH_* */
92         void *private;          /* for use by protocol implementation */
93         const struct ceph_auth_client_ops *ops;  /* null iff protocol==0 */
94
95         bool negotiating;       /* true if negotiating protocol */
96         const char *name;       /* entity name */
97         u64 global_id;          /* our unique id in system */
98         const struct ceph_crypto_key *key;     /* our secret key */
99         unsigned want_keys;     /* which services we want */
100
101         int preferred_mode;     /* CEPH_CON_MODE_* */
102         int fallback_mode;      /* ditto */
103
104         struct mutex mutex;
105 };
106
107 void ceph_auth_set_global_id(struct ceph_auth_client *ac, u64 global_id);
108
109 struct ceph_auth_client *ceph_auth_init(const char *name,
110                                         const struct ceph_crypto_key *key,
111                                         const int *con_modes);
112 extern void ceph_auth_destroy(struct ceph_auth_client *ac);
113
114 extern void ceph_auth_reset(struct ceph_auth_client *ac);
115
116 extern int ceph_auth_build_hello(struct ceph_auth_client *ac,
117                                  void *buf, size_t len);
118 extern int ceph_handle_auth_reply(struct ceph_auth_client *ac,
119                                   void *buf, size_t len,
120                                   void *reply_buf, size_t reply_len);
121 int ceph_auth_entity_name_encode(const char *name, void **p, void *end);
122
123 extern int ceph_build_auth(struct ceph_auth_client *ac,
124                     void *msg_buf, size_t msg_len);
125 extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac);
126
127 int __ceph_auth_get_authorizer(struct ceph_auth_client *ac,
128                                struct ceph_auth_handshake *auth,
129                                int peer_type, bool force_new,
130                                int *proto, int *pref_mode, int *fallb_mode);
131 void ceph_auth_destroy_authorizer(struct ceph_authorizer *a);
132 int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
133                                        struct ceph_authorizer *a,
134                                        void *challenge_buf,
135                                        int challenge_buf_len);
136 int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
137                                       struct ceph_authorizer *a,
138                                       void *reply, int reply_len,
139                                       u8 *session_key, int *session_key_len,
140                                       u8 *con_secret, int *con_secret_len);
141 extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac,
142                                             int peer_type);
143
144 static inline int ceph_auth_sign_message(struct ceph_auth_handshake *auth,
145                                          struct ceph_msg *msg)
146 {
147         if (auth->sign_message)
148                 return auth->sign_message(auth, msg);
149         return 0;
150 }
151
152 static inline
153 int ceph_auth_check_message_signature(struct ceph_auth_handshake *auth,
154                                       struct ceph_msg *msg)
155 {
156         if (auth->check_message_signature)
157                 return auth->check_message_signature(auth, msg);
158         return 0;
159 }
160
161 int ceph_auth_get_request(struct ceph_auth_client *ac, void *buf, int buf_len);
162 int ceph_auth_handle_reply_more(struct ceph_auth_client *ac, void *reply,
163                                 int reply_len, void *buf, int buf_len);
164 int ceph_auth_handle_reply_done(struct ceph_auth_client *ac,
165                                 u64 global_id, void *reply, int reply_len,
166                                 u8 *session_key, int *session_key_len,
167                                 u8 *con_secret, int *con_secret_len);
168 bool ceph_auth_handle_bad_method(struct ceph_auth_client *ac,
169                                  int used_proto, int result,
170                                  const int *allowed_protos, int proto_cnt,
171                                  const int *allowed_modes, int mode_cnt);
172
173 int ceph_auth_get_authorizer(struct ceph_auth_client *ac,
174                              struct ceph_auth_handshake *auth,
175                              int peer_type, void *buf, int *buf_len);
176 int ceph_auth_handle_svc_reply_more(struct ceph_auth_client *ac,
177                                     struct ceph_auth_handshake *auth,
178                                     void *reply, int reply_len,
179                                     void *buf, int *buf_len);
180 int ceph_auth_handle_svc_reply_done(struct ceph_auth_client *ac,
181                                     struct ceph_auth_handshake *auth,
182                                     void *reply, int reply_len,
183                                     u8 *session_key, int *session_key_len,
184                                     u8 *con_secret, int *con_secret_len);
185 bool ceph_auth_handle_bad_authorizer(struct ceph_auth_client *ac,
186                                      int peer_type, int used_proto, int result,
187                                      const int *allowed_protos, int proto_cnt,
188                                      const int *allowed_modes, int mode_cnt);
189
190 #endif