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Sage Weil4e7a5dc2009-11-18 16:19:57 -08001
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07002#include <linux/ceph/ceph_debug.h>
Sage Weil4e7a5dc2009-11-18 16:19:57 -08003
4#include <linux/err.h>
5#include <linux/module.h>
6#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09007#include <linux/slab.h>
Sage Weil4e7a5dc2009-11-18 16:19:57 -08008
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07009#include <linux/ceph/decode.h>
10#include <linux/ceph/auth.h>
11
Sage Weil4e7a5dc2009-11-18 16:19:57 -080012#include "auth_none.h"
Sage Weil4e7a5dc2009-11-18 16:19:57 -080013
14static void reset(struct ceph_auth_client *ac)
15{
16 struct ceph_auth_none_info *xi = ac->private;
17
18 xi->starting = true;
19 xi->built_authorizer = false;
20}
21
22static void destroy(struct ceph_auth_client *ac)
23{
24 kfree(ac->private);
25 ac->private = NULL;
26}
27
28static int is_authenticated(struct ceph_auth_client *ac)
29{
30 struct ceph_auth_none_info *xi = ac->private;
31
32 return !xi->starting;
33}
34
Sage Weila41359f2010-05-25 15:39:06 -070035static int should_authenticate(struct ceph_auth_client *ac)
36{
37 struct ceph_auth_none_info *xi = ac->private;
38
39 return xi->starting;
40}
41
Tyler Hicks2cb33ca2013-06-20 13:13:59 -070042static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
43{
44 return 0;
45}
46
Sage Weil4e7a5dc2009-11-18 16:19:57 -080047/*
48 * the generic auth code decode the global_id, and we carry no actual
49 * authenticate state, so nothing happens here.
50 */
51static int handle_reply(struct ceph_auth_client *ac, int result,
52 void *buf, void *end)
53{
54 struct ceph_auth_none_info *xi = ac->private;
55
56 xi->starting = false;
57 return result;
58}
59
60/*
61 * build an 'authorizer' with our entity_name and global_id. we can
62 * reuse a single static copy since it is identical for all services
63 * we connect to.
64 */
65static int ceph_auth_none_create_authorizer(
66 struct ceph_auth_client *ac, int peer_type,
Alex Elder74f18692012-05-16 15:16:39 -050067 struct ceph_auth_handshake *auth)
Sage Weil4e7a5dc2009-11-18 16:19:57 -080068{
69 struct ceph_auth_none_info *ai = ac->private;
70 struct ceph_none_authorizer *au = &ai->au;
71 void *p, *end;
72 int ret;
73
74 if (!ai->built_authorizer) {
75 p = au->buf;
76 end = p + sizeof(au->buf);
Sage Weil07c87392010-02-04 09:42:20 -080077 ceph_encode_8(&p, 1);
Sage Weil4e7a5dc2009-11-18 16:19:57 -080078 ret = ceph_entity_name_encode(ac->name, &p, end - 8);
79 if (ret < 0)
80 goto bad;
81 ceph_decode_need(&p, end, sizeof(u64), bad2);
82 ceph_encode_64(&p, ac->global_id);
83 au->buf_len = p - (void *)au->buf;
84 ai->built_authorizer = true;
85 dout("built authorizer len %d\n", au->buf_len);
86 }
87
Alex Elder74f18692012-05-16 15:16:39 -050088 auth->authorizer = (struct ceph_authorizer *) au;
89 auth->authorizer_buf = au->buf;
90 auth->authorizer_buf_len = au->buf_len;
91 auth->authorizer_reply_buf = au->reply_buf;
92 auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
93
Sage Weil4e7a5dc2009-11-18 16:19:57 -080094 return 0;
95
96bad2:
97 ret = -ERANGE;
98bad:
99 return ret;
100}
101
102static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
103 struct ceph_authorizer *a)
104{
105 /* nothing to do */
106}
107
108static const struct ceph_auth_client_ops ceph_auth_none_ops = {
Sage Weil559c1e02010-05-14 09:55:18 -0700109 .name = "none",
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800110 .reset = reset,
111 .destroy = destroy,
112 .is_authenticated = is_authenticated,
Sage Weila41359f2010-05-25 15:39:06 -0700113 .should_authenticate = should_authenticate,
Tyler Hicks2cb33ca2013-06-20 13:13:59 -0700114 .build_request = build_request,
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800115 .handle_reply = handle_reply,
116 .create_authorizer = ceph_auth_none_create_authorizer,
117 .destroy_authorizer = ceph_auth_none_destroy_authorizer,
118};
119
120int ceph_auth_none_init(struct ceph_auth_client *ac)
121{
122 struct ceph_auth_none_info *xi;
123
124 dout("ceph_auth_none_init %p\n", ac);
125 xi = kzalloc(sizeof(*xi), GFP_NOFS);
126 if (!xi)
127 return -ENOMEM;
128
129 xi->starting = true;
130 xi->built_authorizer = false;
131
132 ac->protocol = CEPH_AUTH_NONE;
133 ac->private = xi;
134 ac->ops = &ceph_auth_none_ops;
135 return 0;
136}
137