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 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 22 static void destroy(struct ceph_auth_client *ac) 23 { 24 kfree(ac->private); 25 ac->private = NULL; 26 } 27 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 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 42 /* 43 * the generic auth code decode the global_id, and we carry no actual 44 * authenticate state, so nothing happens here. 45 */ 46 static 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 */ 60 static int ceph_auth_none_create_authorizer( 61 struct ceph_auth_client *ac, int peer_type, 62 struct ceph_auth_handshake *auth) 63 { 64 struct ceph_auth_none_info *ai = ac->private; 65 struct ceph_none_authorizer *au = &ai->au; 66 void *p, *end; 67 int ret; 68 69 if (!ai->built_authorizer) { 70 p = au->buf; 71 end = p + sizeof(au->buf); 72 ceph_encode_8(&p, 1); 73 ret = ceph_entity_name_encode(ac->name, &p, end - 8); 74 if (ret < 0) 75 goto bad; 76 ceph_decode_need(&p, end, sizeof(u64), bad2); 77 ceph_encode_64(&p, ac->global_id); 78 au->buf_len = p - (void *)au->buf; 79 ai->built_authorizer = true; 80 dout("built authorizer len %d\n", au->buf_len); 81 } 82 83 auth->authorizer = (struct ceph_authorizer *) au; 84 auth->authorizer_buf = au->buf; 85 auth->authorizer_buf_len = au->buf_len; 86 auth->authorizer_reply_buf = au->reply_buf; 87 auth->authorizer_reply_buf_len = sizeof (au->reply_buf); 88 89 return 0; 90 91 bad2: 92 ret = -ERANGE; 93 bad: 94 return ret; 95 } 96 97 static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac, 98 struct ceph_authorizer *a) 99 { 100 /* nothing to do */ 101 } 102 103 static const struct ceph_auth_client_ops ceph_auth_none_ops = { 104 .name = "none", 105 .reset = reset, 106 .destroy = destroy, 107 .is_authenticated = is_authenticated, 108 .should_authenticate = should_authenticate, 109 .handle_reply = handle_reply, 110 .create_authorizer = ceph_auth_none_create_authorizer, 111 .destroy_authorizer = ceph_auth_none_destroy_authorizer, 112 }; 113 114 int ceph_auth_none_init(struct ceph_auth_client *ac) 115 { 116 struct ceph_auth_none_info *xi; 117 118 dout("ceph_auth_none_init %p\n", ac); 119 xi = kzalloc(sizeof(*xi), GFP_NOFS); 120 if (!xi) 121 return -ENOMEM; 122 123 xi->starting = true; 124 xi->built_authorizer = false; 125 126 ac->protocol = CEPH_AUTH_NONE; 127 ac->private = xi; 128 ac->ops = &ceph_auth_none_ops; 129 return 0; 130 } 131 132