blob: 24407c1192915c25b06b1b04f4bdb2aa82f5dbd4 [file] [log] [blame]
Sage Weil4e7a5dc2009-11-18 16:19:57 -08001
2#include "ceph_debug.h"
3
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
9#include "auth_none.h"
10#include "auth.h"
11#include "decode.h"
12
13static void reset(struct ceph_auth_client *ac)
14{
15 struct ceph_auth_none_info *xi = ac->private;
16
17 xi->starting = true;
18 xi->built_authorizer = false;
19}
20
21static void destroy(struct ceph_auth_client *ac)
22{
23 kfree(ac->private);
24 ac->private = NULL;
25}
26
27static int is_authenticated(struct ceph_auth_client *ac)
28{
29 struct ceph_auth_none_info *xi = ac->private;
30
31 return !xi->starting;
32}
33
34/*
35 * the generic auth code decode the global_id, and we carry no actual
36 * authenticate state, so nothing happens here.
37 */
38static int handle_reply(struct ceph_auth_client *ac, int result,
39 void *buf, void *end)
40{
41 struct ceph_auth_none_info *xi = ac->private;
42
43 xi->starting = false;
44 return result;
45}
46
47/*
48 * build an 'authorizer' with our entity_name and global_id. we can
49 * reuse a single static copy since it is identical for all services
50 * we connect to.
51 */
52static int ceph_auth_none_create_authorizer(
53 struct ceph_auth_client *ac, int peer_type,
54 struct ceph_authorizer **a,
55 void **buf, size_t *len,
56 void **reply_buf, size_t *reply_len)
57{
58 struct ceph_auth_none_info *ai = ac->private;
59 struct ceph_none_authorizer *au = &ai->au;
60 void *p, *end;
61 int ret;
62
63 if (!ai->built_authorizer) {
64 p = au->buf;
65 end = p + sizeof(au->buf);
Sage Weil07c87392010-02-04 09:42:20 -080066 ceph_encode_8(&p, 1);
Sage Weil4e7a5dc2009-11-18 16:19:57 -080067 ret = ceph_entity_name_encode(ac->name, &p, end - 8);
68 if (ret < 0)
69 goto bad;
70 ceph_decode_need(&p, end, sizeof(u64), bad2);
71 ceph_encode_64(&p, ac->global_id);
72 au->buf_len = p - (void *)au->buf;
73 ai->built_authorizer = true;
74 dout("built authorizer len %d\n", au->buf_len);
75 }
76
77 *a = (struct ceph_authorizer *)au;
78 *buf = au->buf;
79 *len = au->buf_len;
80 *reply_buf = au->reply_buf;
81 *reply_len = sizeof(au->reply_buf);
82 return 0;
83
84bad2:
85 ret = -ERANGE;
86bad:
87 return ret;
88}
89
90static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
91 struct ceph_authorizer *a)
92{
93 /* nothing to do */
94}
95
96static const struct ceph_auth_client_ops ceph_auth_none_ops = {
Sage Weil559c1e02010-05-14 09:55:18 -070097 .name = "none",
Sage Weil4e7a5dc2009-11-18 16:19:57 -080098 .reset = reset,
99 .destroy = destroy,
100 .is_authenticated = is_authenticated,
101 .handle_reply = handle_reply,
102 .create_authorizer = ceph_auth_none_create_authorizer,
103 .destroy_authorizer = ceph_auth_none_destroy_authorizer,
104};
105
106int ceph_auth_none_init(struct ceph_auth_client *ac)
107{
108 struct ceph_auth_none_info *xi;
109
110 dout("ceph_auth_none_init %p\n", ac);
111 xi = kzalloc(sizeof(*xi), GFP_NOFS);
112 if (!xi)
113 return -ENOMEM;
114
115 xi->starting = true;
116 xi->built_authorizer = false;
117
118 ac->protocol = CEPH_AUTH_NONE;
119 ac->private = xi;
120 ac->ops = &ceph_auth_none_ops;
121 return 0;
122}
123