1 2#include "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 "auth_none.h" 10#include "auth.h" 11#include "decode.h" 12 13static void reset(struct ceph_auth_client *ac) 14{ 15 struct ceph_auth_none_info *xi = ac->private; 16 17 xi->starting = true; 18 xi->built_authorizer = false; 19} 20 21static void destroy(struct ceph_auth_client *ac) 22{ 23 kfree(ac->private); 24 ac->private = NULL; 25} 26 27static 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 34static 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 41/* 42 * the generic auth code decode the global_id, and we carry no actual 43 * authenticate state, so nothing happens here. 44 */ 45static int handle_reply(struct ceph_auth_client *ac, int result, 46 void *buf, void *end) 47{ 48 struct ceph_auth_none_info *xi = ac->private; 49 50 xi->starting = false; 51 return result; 52} 53 54/* 55 * build an 'authorizer' with our entity_name and global_id. we can 56 * reuse a single static copy since it is identical for all services 57 * we connect to. 58 */ 59static int ceph_auth_none_create_authorizer( 60 struct ceph_auth_client *ac, int peer_type, 61 struct ceph_authorizer **a, 62 void **buf, size_t *len, 63 void **reply_buf, size_t *reply_len) 64{ 65 struct ceph_auth_none_info *ai = ac->private; 66 struct ceph_none_authorizer *au = &ai->au; 67 void *p, *end; 68 int ret; 69 70 if (!ai->built_authorizer) { 71 p = au->buf; 72 end = p + sizeof(au->buf); 73 ceph_encode_8(&p, 1); 74 ret = ceph_entity_name_encode(ac->name, &p, end - 8); 75 if (ret < 0) 76 goto bad; 77 ceph_decode_need(&p, end, sizeof(u64), bad2); 78 ceph_encode_64(&p, ac->global_id); 79 au->buf_len = p - (void *)au->buf; 80 ai->built_authorizer = true; 81 dout("built authorizer len %d\n", au->buf_len); 82 } 83 84 *a = (struct ceph_authorizer *)au; 85 *buf = au->buf; 86 *len = au->buf_len; 87 *reply_buf = au->reply_buf; 88 *reply_len = sizeof(au->reply_buf); 89 return 0; 90 91bad2: 92 ret = -ERANGE; 93bad: 94 return ret; 95} 96 97static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac, 98 struct ceph_authorizer *a) 99{ 100 /* nothing to do */ 101} 102 103static 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 114int 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