1
2 #include <linux/ceph/ceph_debug.h>
3
4 #include <linux/err.h>
5 #include <linux/module.h>
6 #include <linux/random.h>
7 #include <linux/slab.h>
8
9 #include <linux/ceph/decode.h>
10 #include <linux/ceph/auth.h>
11
12 #include "auth_none.h"
13
reset(struct ceph_auth_client * ac)14 static 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
destroy(struct ceph_auth_client * ac)22 static void destroy(struct ceph_auth_client *ac)
23 {
24 kfree(ac->private);
25 ac->private = NULL;
26 }
27
is_authenticated(struct ceph_auth_client * ac)28 static 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
should_authenticate(struct ceph_auth_client * ac)35 static 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
build_request(struct ceph_auth_client * ac,void * buf,void * end)42 static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
43 {
44 return 0;
45 }
46
47 /*
48 * the generic auth code decode the global_id, and we carry no actual
49 * authenticate state, so nothing happens here.
50 */
handle_reply(struct ceph_auth_client * ac,int result,void * buf,void * end)51 static 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 */
ceph_auth_none_create_authorizer(struct ceph_auth_client * ac,int peer_type,struct ceph_auth_handshake * auth)65 static int ceph_auth_none_create_authorizer(
66 struct ceph_auth_client *ac, int peer_type,
67 struct ceph_auth_handshake *auth)
68 {
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);
77 ceph_encode_8(&p, 1);
78 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
88 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
94 return 0;
95
96 bad2:
97 ret = -ERANGE;
98 bad:
99 return ret;
100 }
101
ceph_auth_none_destroy_authorizer(struct ceph_auth_client * ac,struct ceph_authorizer * a)102 static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
103 struct ceph_authorizer *a)
104 {
105 /* nothing to do */
106 }
107
108 static const struct ceph_auth_client_ops ceph_auth_none_ops = {
109 .name = "none",
110 .reset = reset,
111 .destroy = destroy,
112 .is_authenticated = is_authenticated,
113 .should_authenticate = should_authenticate,
114 .build_request = build_request,
115 .handle_reply = handle_reply,
116 .create_authorizer = ceph_auth_none_create_authorizer,
117 .destroy_authorizer = ceph_auth_none_destroy_authorizer,
118 };
119
ceph_auth_none_init(struct ceph_auth_client * ac)120 int 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
138