blob: 214c2bb43d6252056a7a77dcd2d8eb5877c719d1 [file] [log] [blame]
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
Sage Weil4e7a5dc2009-11-18 16:19:57 -080042/*
43 * the generic auth code decode the global_id, and we carry no actual
44 * authenticate state, so nothing happens here.
45 */
46static int handle_reply(struct ceph_auth_client *ac, int result,
47 void *buf, void *end)
48{
49 struct ceph_auth_none_info *xi = ac->private;
50
51 xi->starting = false;
52 return result;
53}
54
55/*
56 * build an 'authorizer' with our entity_name and global_id. we can
57 * reuse a single static copy since it is identical for all services
58 * we connect to.
59 */
60static int ceph_auth_none_create_authorizer(
61 struct ceph_auth_client *ac, int peer_type,
62 struct ceph_authorizer **a,
63 void **buf, size_t *len,
64 void **reply_buf, size_t *reply_len)
65{
66 struct ceph_auth_none_info *ai = ac->private;
67 struct ceph_none_authorizer *au = &ai->au;
68 void *p, *end;
69 int ret;
70
71 if (!ai->built_authorizer) {
72 p = au->buf;
73 end = p + sizeof(au->buf);
Sage Weil07c87392010-02-04 09:42:20 -080074 ceph_encode_8(&p, 1);
Sage Weil4e7a5dc2009-11-18 16:19:57 -080075 ret = ceph_entity_name_encode(ac->name, &p, end - 8);
76 if (ret < 0)
77 goto bad;
78 ceph_decode_need(&p, end, sizeof(u64), bad2);
79 ceph_encode_64(&p, ac->global_id);
80 au->buf_len = p - (void *)au->buf;
81 ai->built_authorizer = true;
82 dout("built authorizer len %d\n", au->buf_len);
83 }
84
85 *a = (struct ceph_authorizer *)au;
86 *buf = au->buf;
87 *len = au->buf_len;
88 *reply_buf = au->reply_buf;
89 *reply_len = sizeof(au->reply_buf);
90 return 0;
91
92bad2:
93 ret = -ERANGE;
94bad:
95 return ret;
96}
97
98static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
99 struct ceph_authorizer *a)
100{
101 /* nothing to do */
102}
103
104static const struct ceph_auth_client_ops ceph_auth_none_ops = {
Sage Weil559c1e02010-05-14 09:55:18 -0700105 .name = "none",
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800106 .reset = reset,
107 .destroy = destroy,
108 .is_authenticated = is_authenticated,
Sage Weila41359f2010-05-25 15:39:06 -0700109 .should_authenticate = should_authenticate,
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800110 .handle_reply = handle_reply,
111 .create_authorizer = ceph_auth_none_create_authorizer,
112 .destroy_authorizer = ceph_auth_none_destroy_authorizer,
113};
114
115int ceph_auth_none_init(struct ceph_auth_client *ac)
116{
117 struct ceph_auth_none_info *xi;
118
119 dout("ceph_auth_none_init %p\n", ac);
120 xi = kzalloc(sizeof(*xi), GFP_NOFS);
121 if (!xi)
122 return -ENOMEM;
123
124 xi->starting = true;
125 xi->built_authorizer = false;
126
127 ac->protocol = CEPH_AUTH_NONE;
128 ac->private = xi;
129 ac->ops = &ceph_auth_none_ops;
130 return 0;
131}
132