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libceph: set global_id as soon as we get an auth ticket

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Commit 61ca49a910 ("libceph: don't set global_id until we get an
auth ticket") delayed the setting of global_id too much.  It is set
only after all tickets are received, but in pre-nautilus clusters an
auth ticket and the service tickets are obtained in separate steps
(for a total of three MAuth replies).  When the service tickets are
requested, global_id is used to build an authorizer; if global_id is
still 0 we never get them and fail to establish the session.

Moving the setting of global_id into protocol implementations.  This
way global_id can be set exactly when an auth ticket is received, not
sooner nor later.

Fixes: 61ca49a910 ("libceph: don't set global_id until we get an auth ticket")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
This commit is contained in:
Ilya Dryomov 2021-06-21 12:17:40 +02:00
parent 3c0d089432
commit 03af4c7bad
4 changed files with 16 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/ceph/auth.h
View File

@ -50,7 +50,7 @@ struct ceph_auth_client_ops {
* another request.
*/
int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end);
int (*handle_reply)(struct ceph_auth_client *ac,
int (*handle_reply)(struct ceph_auth_client *ac, u64 global_id,
void *buf, void *end, u8 *session_key,
int *session_key_len, u8 *con_secret,
int *con_secret_len);
@ -104,6 +104,8 @@ struct ceph_auth_client {
struct mutex mutex;
};
void ceph_auth_set_global_id(struct ceph_auth_client *ac, u64 global_id);
struct ceph_auth_client *ceph_auth_init(const char *name,
const struct ceph_crypto_key *key,
const int *con_modes);

13
net/ceph/auth.c
View File

@ -36,7 +36,7 @@ static int init_protocol(struct ceph_auth_client *ac, int proto)
}
}
static void set_global_id(struct ceph_auth_client *ac, u64 global_id)
void ceph_auth_set_global_id(struct ceph_auth_client *ac, u64 global_id)
{
dout("%s global_id %llu\n", __func__, global_id);
@ -267,7 +267,7 @@ int ceph_handle_auth_reply(struct ceph_auth_client *ac,
goto out;
}
ret = ac->ops->handle_reply(ac, payload, payload_end,
ret = ac->ops->handle_reply(ac, global_id, payload, payload_end,
NULL, NULL, NULL, NULL);
if (ret == -EAGAIN) {
ret = build_request(ac, true, reply_buf, reply_len);
@ -276,8 +276,6 @@ int ceph_handle_auth_reply(struct ceph_auth_client *ac,
goto out;
}
set_global_id(ac, global_id);
out:
mutex_unlock(&ac->mutex);
return ret;
@ -485,7 +483,7 @@ int ceph_auth_handle_reply_more(struct ceph_auth_client *ac, void *reply,
int ret;
mutex_lock(&ac->mutex);
ret = ac->ops->handle_reply(ac, reply, reply + reply_len,
ret = ac->ops->handle_reply(ac, 0, reply, reply + reply_len,
NULL, NULL, NULL, NULL);
if (ret == -EAGAIN)
ret = build_request(ac, false, buf, buf_len);
@ -503,11 +501,10 @@ int ceph_auth_handle_reply_done(struct ceph_auth_client *ac,
int ret;
mutex_lock(&ac->mutex);
ret = ac->ops->handle_reply(ac, reply, reply + reply_len,
ret = ac->ops->handle_reply(ac, global_id, reply, reply + reply_len,
session_key, session_key_len,
con_secret, con_secret_len);
if (!ret)
set_global_id(ac, global_id);
WARN_ON(ret == -EAGAIN || ret > 0);
mutex_unlock(&ac->mutex);
return ret;
}

3
net/ceph/auth_none.c
View File

@ -69,7 +69,7 @@ static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
* the generic auth code decode the global_id, and we carry no actual
* authenticate state, so nothing happens here.
*/
static int handle_reply(struct ceph_auth_client *ac,
static int handle_reply(struct ceph_auth_client *ac, u64 global_id,
void *buf, void *end, u8 *session_key,
int *session_key_len, u8 *con_secret,
int *con_secret_len)
@ -77,6 +77,7 @@ static int handle_reply(struct ceph_auth_client *ac,
struct ceph_auth_none_info *xi = ac->private;
xi->starting = false;
ceph_auth_set_global_id(ac, global_id);
return 0;
}

11
net/ceph/auth_x.c
View File

@ -597,7 +597,7 @@ bad:
return -EINVAL;
}
static int handle_auth_session_key(struct ceph_auth_client *ac,
static int handle_auth_session_key(struct ceph_auth_client *ac, u64 global_id,
void **p, void *end,
u8 *session_key, int *session_key_len,
u8 *con_secret, int *con_secret_len)
@ -613,6 +613,7 @@ static int handle_auth_session_key(struct ceph_auth_client *ac,
if (ret)
return ret;
ceph_auth_set_global_id(ac, global_id);
if (*p == end) {
/* pre-nautilus (or didn't request service tickets!) */
WARN_ON(session_key || con_secret);
@ -661,7 +662,7 @@ e_inval:
return -EINVAL;
}
static int ceph_x_handle_reply(struct ceph_auth_client *ac,
static int ceph_x_handle_reply(struct ceph_auth_client *ac, u64 global_id,
void *buf, void *end,
u8 *session_key, int *session_key_len,
u8 *con_secret, int *con_secret_len)
@ -695,9 +696,9 @@ static int ceph_x_handle_reply(struct ceph_auth_client *ac,
switch (op) {
case CEPHX_GET_AUTH_SESSION_KEY:
/* AUTH ticket + [connection secret] + service tickets */
ret = handle_auth_session_key(ac, &p, end, session_key,
session_key_len, con_secret,
con_secret_len);
ret = handle_auth_session_key(ac, global_id, &p, end,
session_key, session_key_len,
con_secret, con_secret_len);
break;
case CEPHX_GET_PRINCIPAL_SESSION_KEY: