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ocfs2/net: Add debug interface to o2net

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This patch exposes o2net information via debugfs. The information includes
the list of sockets (sock_containers) as well as the list of outstanding
messages (send_tracking). Useful for o2dlm debugging.

(This patch is derived from an earlier one written by Zach Brown that
exposed the same information via /proc.)

[Mark: checkpatch fixes]

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Reviewed-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Sunil Mushran
2008-04-14 10:46:19 -07:00
committed by Mark Fasheh
parent 93b06edb51
commit 2309e9e040
6 changed files with 569 additions and 3 deletions
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68
fs/ocfs2/cluster/tcp.c
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@ -142,6 +142,54 @@ static void o2net_idle_timer(unsigned long data);
static void o2net_sc_postpone_idle(struct o2net_sock_container *sc);
static void o2net_sc_reset_idle_timer(struct o2net_sock_container *sc);
static void o2net_init_nst(struct o2net_send_tracking *nst, u32 msgtype,
u32 msgkey, struct task_struct *task, u8 node)
{
#ifdef CONFIG_DEBUG_FS
INIT_LIST_HEAD(&nst->st_net_debug_item);
nst->st_task = task;
nst->st_msg_type = msgtype;
nst->st_msg_key = msgkey;
nst->st_node = node;
#endif
}
static void o2net_set_nst_sock_time(struct o2net_send_tracking *nst)
{
#ifdef CONFIG_DEBUG_FS
do_gettimeofday(&nst->st_sock_time);
#endif
}
static void o2net_set_nst_send_time(struct o2net_send_tracking *nst)
{
#ifdef CONFIG_DEBUG_FS
do_gettimeofday(&nst->st_send_time);
#endif
}
static void o2net_set_nst_status_time(struct o2net_send_tracking *nst)
{
#ifdef CONFIG_DEBUG_FS
do_gettimeofday(&nst->st_status_time);
#endif
}
static void o2net_set_nst_sock_container(struct o2net_send_tracking *nst,
struct o2net_sock_container *sc)
{
#ifdef CONFIG_DEBUG_FS
nst->st_sc = sc;
#endif
}
static void o2net_set_nst_msg_id(struct o2net_send_tracking *nst, u32 msg_id)
{
#ifdef CONFIG_DEBUG_FS
nst->st_id = msg_id;
#endif
}
static inline int o2net_reconnect_delay(void)
{
return o2nm_single_cluster->cl_reconnect_delay_ms;
@ -290,6 +338,7 @@ static void sc_kref_release(struct kref *kref)
o2nm_node_put(sc->sc_node);
sc->sc_node = NULL;
o2net_debug_del_sc(sc);
kfree(sc);
}
@ -330,6 +379,7 @@ static struct o2net_sock_container *sc_alloc(struct o2nm_node *node)
ret = sc;
sc->sc_page = page;
o2net_debug_add_sc(sc);
sc = NULL;
page = NULL;
@ -913,6 +963,9 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec,
struct o2net_status_wait nsw = {
.ns_node_item = LIST_HEAD_INIT(nsw.ns_node_item),
};
struct o2net_send_tracking nst;
o2net_init_nst(&nst, msg_type, key, current, target_node);
if (o2net_wq == NULL) {
mlog(0, "attempt to tx without o2netd running\n");
@ -938,6 +991,10 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec,
goto out;
}
o2net_debug_add_nst(&nst);
o2net_set_nst_sock_time(&nst);
ret = wait_event_interruptible(nn->nn_sc_wq,
o2net_tx_can_proceed(nn, &sc, &error));
if (!ret && error)
@ -945,6 +1002,8 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec,
if (ret)
goto out;
o2net_set_nst_sock_container(&nst, sc);
veclen = caller_veclen + 1;
vec = kmalloc(sizeof(struct kvec) * veclen, GFP_ATOMIC);
if (vec == NULL) {
@ -971,6 +1030,9 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec,
goto out;
msg->msg_num = cpu_to_be32(nsw.ns_id);
o2net_set_nst_msg_id(&nst, nsw.ns_id);
o2net_set_nst_send_time(&nst);
/* finally, convert the message header to network byte-order
* and send */
@ -985,6 +1047,7 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec,
}
/* wait on other node's handler */
o2net_set_nst_status_time(&nst);
wait_event(nsw.ns_wq, o2net_nsw_completed(nn, &nsw));
/* Note that we avoid overwriting the callers status return
@ -997,6 +1060,7 @@ int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *caller_vec,
mlog(0, "woken, returning system status %d, user status %d\n",
ret, nsw.ns_status);
out:
o2net_debug_del_nst(&nst); /* must be before dropping sc and node */
if (sc)
sc_put(sc);
if (vec)
@ -1935,6 +1999,9 @@ int o2net_init(void)
o2quo_init();
if (o2net_debugfs_init())
return -ENOMEM;
o2net_hand = kzalloc(sizeof(struct o2net_handshake), GFP_KERNEL);
o2net_keep_req = kzalloc(sizeof(struct o2net_msg), GFP_KERNEL);
o2net_keep_resp = kzalloc(sizeof(struct o2net_msg), GFP_KERNEL);
@ -1976,4 +2043,5 @@ void o2net_exit(void)
kfree(o2net_hand);
kfree(o2net_keep_req);
kfree(o2net_keep_resp);
o2net_debugfs_exit();
}