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 }
20
destroy(struct ceph_auth_client * ac)21 static void destroy(struct ceph_auth_client *ac)
22 {
23 kfree(ac->private);
24 ac->private = NULL;
25 }
26
is_authenticated(struct ceph_auth_client * ac)27 static 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
should_authenticate(struct ceph_auth_client * ac)34 static int should_authenticate(struct ceph_auth_client *ac)
35 {
36 struct ceph_auth_none_info *xi = ac->private;
37
38 return xi->starting;
39 }
40
ceph_auth_none_build_authorizer(struct ceph_auth_client * ac,struct ceph_none_authorizer * au)41 static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac,
42 struct ceph_none_authorizer *au)
43 {
44 void *p = au->buf;
45 void *const end = p + sizeof(au->buf);
46 int ret;
47
48 ceph_encode_8_safe(&p, end, 1, e_range);
49 ret = ceph_auth_entity_name_encode(ac->name, &p, end);
50 if (ret < 0)
51 return ret;
52
53 ceph_encode_64_safe(&p, end, ac->global_id, e_range);
54 au->buf_len = p - (void *)au->buf;
55 dout("%s built authorizer len %d\n", __func__, au->buf_len);
56 return 0;
57
58 e_range:
59 return -ERANGE;
60 }
61
build_request(struct ceph_auth_client * ac,void * buf,void * end)62 static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
63 {
64 return 0;
65 }
66
67 /*
68 * the generic auth code decode the global_id, and we carry no actual
69 * authenticate state, so nothing happens here.
70 */
handle_reply(struct ceph_auth_client * ac,int result,void * buf,void * end)71 static int handle_reply(struct ceph_auth_client *ac, int result,
72 void *buf, void *end)
73 {
74 struct ceph_auth_none_info *xi = ac->private;
75
76 xi->starting = false;
77 return result;
78 }
79
ceph_auth_none_destroy_authorizer(struct ceph_authorizer * a)80 static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
81 {
82 kfree(a);
83 }
84
85 /*
86 * build an 'authorizer' with our entity_name and global_id. it is
87 * identical for all services we connect to.
88 */
ceph_auth_none_create_authorizer(struct ceph_auth_client * ac,int peer_type,struct ceph_auth_handshake * auth)89 static int ceph_auth_none_create_authorizer(
90 struct ceph_auth_client *ac, int peer_type,
91 struct ceph_auth_handshake *auth)
92 {
93 struct ceph_none_authorizer *au;
94 int ret;
95
96 au = kmalloc(sizeof(*au), GFP_NOFS);
97 if (!au)
98 return -ENOMEM;
99
100 au->base.destroy = ceph_auth_none_destroy_authorizer;
101
102 ret = ceph_auth_none_build_authorizer(ac, au);
103 if (ret) {
104 kfree(au);
105 return ret;
106 }
107
108 auth->authorizer = (struct ceph_authorizer *) au;
109 auth->authorizer_buf = au->buf;
110 auth->authorizer_buf_len = au->buf_len;
111 auth->authorizer_reply_buf = au->reply_buf;
112 auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
113
114 return 0;
115 }
116
117 static const struct ceph_auth_client_ops ceph_auth_none_ops = {
118 .name = "none",
119 .reset = reset,
120 .destroy = destroy,
121 .is_authenticated = is_authenticated,
122 .should_authenticate = should_authenticate,
123 .build_request = build_request,
124 .handle_reply = handle_reply,
125 .create_authorizer = ceph_auth_none_create_authorizer,
126 };
127
ceph_auth_none_init(struct ceph_auth_client * ac)128 int ceph_auth_none_init(struct ceph_auth_client *ac)
129 {
130 struct ceph_auth_none_info *xi;
131
132 dout("ceph_auth_none_init %p\n", ac);
133 xi = kzalloc(sizeof(*xi), GFP_NOFS);
134 if (!xi)
135 return -ENOMEM;
136
137 xi->starting = true;
138
139 ac->protocol = CEPH_AUTH_NONE;
140 ac->private = xi;
141 ac->ops = &ceph_auth_none_ops;
142 return 0;
143 }
144
145