1 #include "ceph_debug.h"
3 #include <linux/module.h>
12 #include "messenger.h"
15 * get protocol handler
17 static u32 supported_protocols[] = {
22 int ceph_auth_init_protocol(struct ceph_auth_client *ac, int protocol)
26 return ceph_auth_none_init(ac);
28 return ceph_x_init(ac);
37 struct ceph_auth_client *ceph_auth_init(const char *name, const char *secret)
39 struct ceph_auth_client *ac;
42 dout("auth_init name '%s' secret '%s'\n", name, secret);
45 ac = kzalloc(sizeof(*ac), GFP_NOFS);
49 ac->negotiating = true;
53 ac->name = CEPH_AUTH_NAME_DEFAULT;
54 dout("auth_init name %s secret %s\n", ac->name, secret);
62 void ceph_auth_destroy(struct ceph_auth_client *ac)
64 dout("auth_destroy %p\n", ac);
71 * Reset occurs when reconnecting to the monitor.
73 void ceph_auth_reset(struct ceph_auth_client *ac)
75 dout("auth_reset %p\n", ac);
76 if (ac->ops && !ac->negotiating)
78 ac->negotiating = true;
81 int ceph_entity_name_encode(const char *name, void **p, void *end)
83 int len = strlen(name);
85 if (*p + 2*sizeof(u32) + len > end)
87 ceph_encode_32(p, CEPH_ENTITY_TYPE_CLIENT);
88 ceph_encode_32(p, len);
89 ceph_encode_copy(p, name, len);
94 * Initiate protocol negotiation with monitor. Include entity name
95 * and list supported protocols.
97 int ceph_auth_build_hello(struct ceph_auth_client *ac, void *buf, size_t len)
99 struct ceph_mon_request_header *monhdr = buf;
100 void *p = monhdr + 1, *end = buf + len, *lenp;
104 dout("auth_build_hello\n");
105 monhdr->have_version = 0;
106 monhdr->session_mon = cpu_to_le16(-1);
107 monhdr->session_mon_tid = 0;
109 ceph_encode_32(&p, 0); /* no protocol, yet */
114 ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
115 ceph_encode_8(&p, 1);
116 num = ARRAY_SIZE(supported_protocols);
117 ceph_encode_32(&p, num);
118 ceph_decode_need(&p, end, num * sizeof(u32), bad);
119 for (i = 0; i < num; i++)
120 ceph_encode_32(&p, supported_protocols[i]);
122 ret = ceph_entity_name_encode(ac->name, &p, end);
125 ceph_decode_need(&p, end, sizeof(u64), bad);
126 ceph_encode_64(&p, ac->global_id);
128 ceph_encode_32(&lenp, p - lenp - sizeof(u32));
135 int ceph_build_auth_request(struct ceph_auth_client *ac,
136 void *msg_buf, size_t msg_len)
138 struct ceph_mon_request_header *monhdr = msg_buf;
139 void *p = monhdr + 1;
140 void *end = msg_buf + msg_len;
143 monhdr->have_version = 0;
144 monhdr->session_mon = cpu_to_le16(-1);
145 monhdr->session_mon_tid = 0;
147 ceph_encode_32(&p, ac->protocol);
149 ret = ac->ops->build_request(ac, p + sizeof(u32), end);
151 pr_err("error %d building request\n", ret);
154 dout(" built request %d bytes\n", ret);
155 ceph_encode_32(&p, ret);
156 return p + ret - msg_buf;
160 * Handle auth message from monitor.
162 int ceph_handle_auth_reply(struct ceph_auth_client *ac,
163 void *buf, size_t len,
164 void *reply_buf, size_t reply_len)
167 void *end = buf + len;
171 void *payload, *payload_end;
177 dout("handle_auth_reply %p %p\n", p, end);
178 ceph_decode_need(&p, end, sizeof(u32) * 3 + sizeof(u64), bad);
179 protocol = ceph_decode_32(&p);
180 result = ceph_decode_32(&p);
181 global_id = ceph_decode_64(&p);
182 payload_len = ceph_decode_32(&p);
185 ceph_decode_need(&p, end, sizeof(u32), bad);
186 result_msg_len = ceph_decode_32(&p);
192 dout(" result %d '%.*s' gid %llu len %d\n", result, result_msg_len,
193 result_msg, global_id, payload_len);
195 payload_end = payload + payload_len;
197 if (global_id && ac->global_id != global_id) {
198 dout(" set global_id %lld -> %lld\n", ac->global_id, global_id);
199 ac->global_id = global_id;
202 if (ac->negotiating) {
203 /* server does not support our protocols? */
204 if (!protocol && result < 0) {
208 /* set up (new) protocol handler? */
209 if (ac->protocol && ac->protocol != protocol) {
210 ac->ops->destroy(ac);
214 if (ac->protocol != protocol) {
215 ret = ceph_auth_init_protocol(ac, protocol);
217 pr_err("error %d on auth protocol %d init\n",
223 ac->negotiating = false;
226 ret = ac->ops->handle_reply(ac, result, payload, payload_end);
227 if (ret == -EAGAIN) {
228 return ceph_build_auth_request(ac, reply_buf, reply_len);
230 pr_err("authentication error %d\n", ret);
236 pr_err("failed to decode auth msg\n");
241 int ceph_build_auth(struct ceph_auth_client *ac,
242 void *msg_buf, size_t msg_len)
245 return ceph_auth_build_hello(ac, msg_buf, msg_len);
247 if (!ac->ops->is_authenticated(ac))
248 return ceph_build_auth_request(ac, msg_buf, msg_len);
252 int ceph_auth_is_authenticated(struct ceph_auth_client *ac)
256 return ac->ops->is_authenticated(ac);