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libceph: move debugfs initialization into __ceph_open_session() 

Our debugfs dir name is a concatenation of cluster fsid and client
unique ID ("global_id").  It used to be the case that we learned
global_id first, nowadays we always learn fsid first - the monmap is
sent before any auth replies are.  ceph_debugfs_client_init() call in
ceph_monc_handle_map() is therefore never executed and can be removed.

Its counterpart in handle_auth_reply() doesn't really belong there
either: having to do monc->client and unlocking early to work around
lockdep is a testament to that.  Move it into __ceph_open_session(),
where it can be called unconditionally.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2016-01-06 12:56:21 +03:00
parent 3c2de27d79
commit 02ac956c42
2 changed files with 4 additions and 51 deletions
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3
net/ceph/ceph_common.c
View File

@ -686,6 +686,9 @@ int __ceph_open_session(struct ceph_client *client, unsigned long started)
return client->auth_err;
}
pr_info("client%llu fsid %pU\n", ceph_client_id(client), &client->fsid);
ceph_debugfs_client_init(client);
return 0;
}
EXPORT_SYMBOL(__ceph_open_session);

52
net/ceph/mon_client.c
View File

@ -353,29 +353,15 @@ int ceph_monc_open_session(struct ceph_mon_client *monc)
}
EXPORT_SYMBOL(ceph_monc_open_session);
/*
* We require the fsid and global_id in order to initialize our
* debugfs dir.
*/
static bool have_debugfs_info(struct ceph_mon_client *monc)
{
dout("have_debugfs_info fsid %d globalid %lld\n",
(int)monc->client->have_fsid, monc->auth->global_id);
return monc->client->have_fsid && monc->auth->global_id > 0;
}
static void ceph_monc_handle_map(struct ceph_mon_client *monc,
struct ceph_msg *msg)
{
struct ceph_client *client = monc->client;
struct ceph_monmap *monmap = NULL, *old = monc->monmap;
void *p, *end;
int had_debugfs_info, init_debugfs = 0;
mutex_lock(&monc->mutex);
had_debugfs_info = have_debugfs_info(monc);
dout("handle_monmap\n");
p = msg->front.iov_base;
end = p + msg->front.iov_len;
@ -395,29 +381,10 @@ static void ceph_monc_handle_map(struct ceph_mon_client *monc,
client->monc.monmap = monmap;
kfree(old);
if (!client->have_fsid) {
client->have_fsid = true;
if (!had_debugfs_info && have_debugfs_info(monc)) {
pr_info("client%lld fsid %pU\n",
ceph_client_id(monc->client),
&monc->client->fsid);
init_debugfs = 1;
}
mutex_unlock(&monc->mutex);
client->have_fsid = true;
if (init_debugfs) {
/*
* do debugfs initialization without mutex to avoid
* creating a locking dependency
*/
ceph_debugfs_client_init(monc->client);
}
goto out_unlocked;
}
out:
mutex_unlock(&monc->mutex);
out_unlocked:
wake_up_all(&client->auth_wq);
}
@ -915,10 +882,8 @@ static void handle_auth_reply(struct ceph_mon_client *monc,
{
int ret;
int was_auth = 0;
int had_debugfs_info, init_debugfs = 0;
mutex_lock(&monc->mutex);
had_debugfs_info = have_debugfs_info(monc);
was_auth = ceph_auth_is_authenticated(monc->auth);
monc->pending_auth = 0;
ret = ceph_handle_auth_reply(monc->auth, msg->front.iov_base,
@ -940,22 +905,7 @@ static void handle_auth_reply(struct ceph_mon_client *monc,
__send_subscribe(monc);
__resend_generic_request(monc);
}
if (!had_debugfs_info && have_debugfs_info(monc)) {
pr_info("client%lld fsid %pU\n",
ceph_client_id(monc->client),
&monc->client->fsid);
init_debugfs = 1;
}
mutex_unlock(&monc->mutex);
if (init_debugfs) {
/*
* do debugfs initialization without mutex to avoid
* creating a locking dependency
*/
ceph_debugfs_client_init(monc->client);
}
}
static int __validate_auth(struct ceph_mon_client *monc)