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authorYehuda Sadeh <yehuda@hq.newdream.net>2010-04-06 18:14:15 -0400
committerSage Weil <sage@newdream.net>2010-10-20 18:37:28 -0400
commit3d14c5d2b6e15c21d8e5467dc62d33127c23a644 (patch)
tree7d123c47847df9d1e865b6b78dc7da3fe739b704 /net/ceph/auth_none.c
parentae1533b62b3369e6ae32338f4a77d64d0e88f676 (diff)
ceph: factor out libceph from Ceph file system
This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'net/ceph/auth_none.c')
-rw-r--r--net/ceph/auth_none.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/net/ceph/auth_none.c b/net/ceph/auth_none.c
new file mode 100644
index 00000000000..214c2bb43d6
--- /dev/null
+++ b/net/ceph/auth_none.c
@@ -0,0 +1,132 @@
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
14static 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
22static void destroy(struct ceph_auth_client *ac)
23{
24 kfree(ac->private);
25 ac->private = NULL;
26}
27
28static 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
35static 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 */
46static 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 */
60static int ceph_auth_none_create_authorizer(
61 struct ceph_auth_client *ac, int peer_type,
62 struct ceph_authorizer **a,
63 void **buf, size_t *len,
64 void **reply_buf, size_t *reply_len)
65{
66 struct ceph_auth_none_info *ai = ac->private;
67 struct ceph_none_authorizer *au = &ai->au;
68 void *p, *end;
69 int ret;
70
71 if (!ai->built_authorizer) {
72 p = au->buf;
73 end = p + sizeof(au->buf);
74 ceph_encode_8(&p, 1);
75 ret = ceph_entity_name_encode(ac->name, &p, end - 8);
76 if (ret < 0)
77 goto bad;
78 ceph_decode_need(&p, end, sizeof(u64), bad2);
79 ceph_encode_64(&p, ac->global_id);
80 au->buf_len = p - (void *)au->buf;
81 ai->built_authorizer = true;
82 dout("built authorizer len %d\n", au->buf_len);
83 }
84
85 *a = (struct ceph_authorizer *)au;
86 *buf = au->buf;
87 *len = au->buf_len;
88 *reply_buf = au->reply_buf;
89 *reply_len = sizeof(au->reply_buf);
90 return 0;
91
92bad2:
93 ret = -ERANGE;
94bad:
95 return ret;
96}
97
98static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,
99 struct ceph_authorizer *a)
100{
101 /* nothing to do */
102}
103
104static const struct ceph_auth_client_ops ceph_auth_none_ops = {
105 .name = "none",
106 .reset = reset,
107 .destroy = destroy,
108 .is_authenticated = is_authenticated,
109 .should_authenticate = should_authenticate,
110 .handle_reply = handle_reply,
111 .create_authorizer = ceph_auth_none_create_authorizer,
112 .destroy_authorizer = ceph_auth_none_destroy_authorizer,
113};
114
115int ceph_auth_none_init(struct ceph_auth_client *ac)
116{
117 struct ceph_auth_none_info *xi;
118
119 dout("ceph_auth_none_init %p\n", ac);
120 xi = kzalloc(sizeof(*xi), GFP_NOFS);
121 if (!xi)
122 return -ENOMEM;
123
124 xi->starting = true;
125 xi->built_authorizer = false;
126
127 ac->protocol = CEPH_AUTH_NONE;
128 ac->private = xi;
129 ac->ops = &ceph_auth_none_ops;
130 return 0;
131}
132