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 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 */ 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 */ 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 } 101 102 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 }; 119 120 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