aboutsummaryrefslogtreecommitdiffstats
path: root/net/ceph/auth_none.c
blob: 214c2bb43d6252056a7a77dcd2d8eb5877c719d1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132

#include <linux/ceph/ceph_debug.h>

#include <linux/err.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/slab.h>

#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>

#include "auth_none.h"

static void reset(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi = ac->private;

	xi->starting = true;
	xi->built_authorizer = false;
}

static void destroy(struct ceph_auth_client *ac)
{
	kfree(ac->private);
	ac->private = NULL;
}

static int is_authenticated(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi = ac->private;

	return !xi->starting;
}

static int should_authenticate(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi = ac->private;

	return xi->starting;
}

/*
 * the generic auth code decode the global_id, and we carry no actual
 * authenticate state, so nothing happens here.
 */
static int handle_reply(struct ceph_auth_client *ac, int result,
			void *buf, void *end)
{
	struct ceph_auth_none_info *xi = ac->private;

	xi->starting = false;
	return result;
}

/*
 * build an 'authorizer' with our entity_name and global_id.  we can
 * reuse a single static copy since it is identical for all services
 * we connect to.
 */
static int ceph_auth_none_create_authorizer(
	struct ceph_auth_client *ac, int peer_type,
	struct ceph_authorizer **a,
	void **buf, size_t *len,
	void **reply_buf, size_t *reply_len)
{
	struct ceph_auth_none_info *ai = ac->private;
	struct ceph_none_authorizer *au = &ai->au;
	void *p, *end;
	int ret;

	if (!ai->built_authorizer) {
		p = au->buf;
		end = p + sizeof(au->buf);
		ceph_encode_8(&p, 1);
		ret = ceph_entity_name_encode(ac->name, &p, end - 8);
		if (ret < 0)
			goto bad;
		ceph_decode_need(&p, end, sizeof(u64), bad2);
		ceph_encode_64(&p, ac->global_id);
		au->buf_len = p - (void *)au->buf;
		ai->built_authorizer = true;
		dout("built authorizer len %d\n", au->buf_len);
	}

	*a = (struct ceph_authorizer *)au;
	*buf = au->buf;
	*len = au->buf_len;
	*reply_buf = au->reply_buf;
	*reply_len = sizeof(au->reply_buf);
	return 0;

bad2:
	ret = -ERANGE;
bad:
	return ret;
}

static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
				      struct ceph_authorizer *a)
{
	/* nothing to do */
}

static const struct ceph_auth_client_ops ceph_auth_none_ops = {
	.name = "none",
	.reset = reset,
	.destroy = destroy,
	.is_authenticated = is_authenticated,
	.should_authenticate = should_authenticate,
	.handle_reply = handle_reply,
	.create_authorizer = ceph_auth_none_create_authorizer,
	.destroy_authorizer = ceph_auth_none_destroy_authorizer,
};

int ceph_auth_none_init(struct ceph_auth_client *ac)
{
	struct ceph_auth_none_info *xi;

	dout("ceph_auth_none_init %p\n", ac);
	xi = kzalloc(sizeof(*xi), GFP_NOFS);
	if (!xi)
		return -ENOMEM;

	xi->starting = true;
	xi->built_authorizer = false;

	ac->protocol = CEPH_AUTH_NONE;
	ac->private = xi;
	ac->ops = &ceph_auth_none_ops;
	return 0;
}