507 lines
12 KiB
C
507 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* netdebug.c
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*
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* debug functionality for o2net
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*
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* Copyright (C) 2005, 2008 Oracle. All rights reserved.
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*/
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#ifdef CONFIG_DEBUG_FS
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/idr.h>
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#include <linux/kref.h>
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#include <linux/seq_file.h>
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include "tcp.h"
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#include "nodemanager.h"
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#define MLOG_MASK_PREFIX ML_TCP
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#include "masklog.h"
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#include "tcp_internal.h"
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#define O2NET_DEBUG_DIR "o2net"
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#define SC_DEBUG_NAME "sock_containers"
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#define NST_DEBUG_NAME "send_tracking"
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#define STATS_DEBUG_NAME "stats"
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#define NODES_DEBUG_NAME "connected_nodes"
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#define SHOW_SOCK_CONTAINERS 0
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#define SHOW_SOCK_STATS 1
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static struct dentry *o2net_dentry;
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static DEFINE_SPINLOCK(o2net_debug_lock);
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static LIST_HEAD(sock_containers);
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static LIST_HEAD(send_tracking);
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void o2net_debug_add_nst(struct o2net_send_tracking *nst)
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{
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spin_lock(&o2net_debug_lock);
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list_add(&nst->st_net_debug_item, &send_tracking);
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spin_unlock(&o2net_debug_lock);
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}
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void o2net_debug_del_nst(struct o2net_send_tracking *nst)
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{
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spin_lock(&o2net_debug_lock);
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if (!list_empty(&nst->st_net_debug_item))
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list_del_init(&nst->st_net_debug_item);
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spin_unlock(&o2net_debug_lock);
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}
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static struct o2net_send_tracking
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*next_nst(struct o2net_send_tracking *nst_start)
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{
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struct o2net_send_tracking *nst, *ret = NULL;
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assert_spin_locked(&o2net_debug_lock);
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list_for_each_entry(nst, &nst_start->st_net_debug_item,
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st_net_debug_item) {
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/* discover the head of the list */
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if (&nst->st_net_debug_item == &send_tracking)
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break;
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/* use st_task to detect real nsts in the list */
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if (nst->st_task != NULL) {
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ret = nst;
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break;
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}
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}
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return ret;
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}
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static void *nst_seq_start(struct seq_file *seq, loff_t *pos)
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{
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struct o2net_send_tracking *nst, *dummy_nst = seq->private;
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spin_lock(&o2net_debug_lock);
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nst = next_nst(dummy_nst);
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spin_unlock(&o2net_debug_lock);
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return nst;
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}
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static void *nst_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct o2net_send_tracking *nst, *dummy_nst = seq->private;
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spin_lock(&o2net_debug_lock);
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nst = next_nst(dummy_nst);
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list_del_init(&dummy_nst->st_net_debug_item);
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if (nst)
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list_add(&dummy_nst->st_net_debug_item,
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&nst->st_net_debug_item);
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spin_unlock(&o2net_debug_lock);
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return nst; /* unused, just needs to be null when done */
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}
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static int nst_seq_show(struct seq_file *seq, void *v)
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{
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struct o2net_send_tracking *nst, *dummy_nst = seq->private;
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ktime_t now;
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s64 sock, send, status;
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spin_lock(&o2net_debug_lock);
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nst = next_nst(dummy_nst);
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if (!nst)
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goto out;
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now = ktime_get();
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sock = ktime_to_us(ktime_sub(now, nst->st_sock_time));
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send = ktime_to_us(ktime_sub(now, nst->st_send_time));
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status = ktime_to_us(ktime_sub(now, nst->st_status_time));
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/* get_task_comm isn't exported. oh well. */
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seq_printf(seq, "%p:\n"
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" pid: %lu\n"
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" tgid: %lu\n"
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" process name: %s\n"
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" node: %u\n"
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" sc: %p\n"
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" message id: %d\n"
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" message type: %u\n"
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" message key: 0x%08x\n"
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" sock acquiry: %lld usecs ago\n"
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" send start: %lld usecs ago\n"
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" wait start: %lld usecs ago\n",
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nst, (unsigned long)task_pid_nr(nst->st_task),
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(unsigned long)nst->st_task->tgid,
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nst->st_task->comm, nst->st_node,
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nst->st_sc, nst->st_id, nst->st_msg_type,
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nst->st_msg_key,
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(long long)sock,
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(long long)send,
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(long long)status);
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out:
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spin_unlock(&o2net_debug_lock);
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return 0;
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}
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static void nst_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static const struct seq_operations nst_seq_ops = {
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.start = nst_seq_start,
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.next = nst_seq_next,
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.stop = nst_seq_stop,
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.show = nst_seq_show,
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};
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static int nst_fop_open(struct inode *inode, struct file *file)
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{
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struct o2net_send_tracking *dummy_nst;
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dummy_nst = __seq_open_private(file, &nst_seq_ops, sizeof(*dummy_nst));
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if (!dummy_nst)
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return -ENOMEM;
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o2net_debug_add_nst(dummy_nst);
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return 0;
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}
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static int nst_fop_release(struct inode *inode, struct file *file)
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{
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struct seq_file *seq = file->private_data;
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struct o2net_send_tracking *dummy_nst = seq->private;
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o2net_debug_del_nst(dummy_nst);
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return seq_release_private(inode, file);
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}
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static const struct file_operations nst_seq_fops = {
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.open = nst_fop_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = nst_fop_release,
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};
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void o2net_debug_add_sc(struct o2net_sock_container *sc)
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{
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spin_lock(&o2net_debug_lock);
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list_add(&sc->sc_net_debug_item, &sock_containers);
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spin_unlock(&o2net_debug_lock);
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}
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void o2net_debug_del_sc(struct o2net_sock_container *sc)
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{
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spin_lock(&o2net_debug_lock);
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list_del_init(&sc->sc_net_debug_item);
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spin_unlock(&o2net_debug_lock);
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}
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struct o2net_sock_debug {
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int dbg_ctxt;
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struct o2net_sock_container *dbg_sock;
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};
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static struct o2net_sock_container
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*next_sc(struct o2net_sock_container *sc_start)
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{
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struct o2net_sock_container *sc, *ret = NULL;
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assert_spin_locked(&o2net_debug_lock);
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list_for_each_entry(sc, &sc_start->sc_net_debug_item,
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sc_net_debug_item) {
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/* discover the head of the list miscast as a sc */
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if (&sc->sc_net_debug_item == &sock_containers)
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break;
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/* use sc_page to detect real scs in the list */
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if (sc->sc_page != NULL) {
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ret = sc;
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break;
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}
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}
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return ret;
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}
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static void *sc_seq_start(struct seq_file *seq, loff_t *pos)
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{
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struct o2net_sock_debug *sd = seq->private;
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struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
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spin_lock(&o2net_debug_lock);
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sc = next_sc(dummy_sc);
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spin_unlock(&o2net_debug_lock);
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return sc;
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}
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static void *sc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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struct o2net_sock_debug *sd = seq->private;
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struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
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spin_lock(&o2net_debug_lock);
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sc = next_sc(dummy_sc);
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list_del_init(&dummy_sc->sc_net_debug_item);
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if (sc)
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list_add(&dummy_sc->sc_net_debug_item, &sc->sc_net_debug_item);
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spin_unlock(&o2net_debug_lock);
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return sc; /* unused, just needs to be null when done */
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}
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#ifdef CONFIG_OCFS2_FS_STATS
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# define sc_send_count(_s) ((_s)->sc_send_count)
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# define sc_recv_count(_s) ((_s)->sc_recv_count)
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# define sc_tv_acquiry_total_ns(_s) (ktime_to_ns((_s)->sc_tv_acquiry_total))
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# define sc_tv_send_total_ns(_s) (ktime_to_ns((_s)->sc_tv_send_total))
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# define sc_tv_status_total_ns(_s) (ktime_to_ns((_s)->sc_tv_status_total))
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# define sc_tv_process_total_ns(_s) (ktime_to_ns((_s)->sc_tv_process_total))
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#else
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# define sc_send_count(_s) (0U)
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# define sc_recv_count(_s) (0U)
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# define sc_tv_acquiry_total_ns(_s) (0LL)
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# define sc_tv_send_total_ns(_s) (0LL)
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# define sc_tv_status_total_ns(_s) (0LL)
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# define sc_tv_process_total_ns(_s) (0LL)
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#endif
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/* So that debugfs.ocfs2 can determine which format is being used */
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#define O2NET_STATS_STR_VERSION 1
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static void sc_show_sock_stats(struct seq_file *seq,
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struct o2net_sock_container *sc)
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{
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if (!sc)
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return;
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seq_printf(seq, "%d,%u,%lu,%lld,%lld,%lld,%lu,%lld\n", O2NET_STATS_STR_VERSION,
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sc->sc_node->nd_num, (unsigned long)sc_send_count(sc),
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(long long)sc_tv_acquiry_total_ns(sc),
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(long long)sc_tv_send_total_ns(sc),
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(long long)sc_tv_status_total_ns(sc),
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(unsigned long)sc_recv_count(sc),
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(long long)sc_tv_process_total_ns(sc));
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}
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static void sc_show_sock_container(struct seq_file *seq,
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struct o2net_sock_container *sc)
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{
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struct inet_sock *inet = NULL;
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__be32 saddr = 0, daddr = 0;
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__be16 sport = 0, dport = 0;
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if (!sc)
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return;
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if (sc->sc_sock) {
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inet = inet_sk(sc->sc_sock->sk);
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/* the stack's structs aren't sparse endian clean */
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saddr = (__force __be32)inet->inet_saddr;
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daddr = (__force __be32)inet->inet_daddr;
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sport = (__force __be16)inet->inet_sport;
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dport = (__force __be16)inet->inet_dport;
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}
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/* XXX sigh, inet-> doesn't have sparse annotation so any
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* use of it here generates a warning with -Wbitwise */
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seq_printf(seq, "%p:\n"
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" krefs: %d\n"
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" sock: %pI4:%u -> "
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"%pI4:%u\n"
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" remote node: %s\n"
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" page off: %zu\n"
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" handshake ok: %u\n"
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" timer: %lld usecs\n"
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" data ready: %lld usecs\n"
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" advance start: %lld usecs\n"
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" advance stop: %lld usecs\n"
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" func start: %lld usecs\n"
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" func stop: %lld usecs\n"
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" func key: 0x%08x\n"
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" func type: %u\n",
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sc,
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kref_read(&sc->sc_kref),
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&saddr, inet ? ntohs(sport) : 0,
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&daddr, inet ? ntohs(dport) : 0,
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sc->sc_node->nd_name,
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sc->sc_page_off,
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sc->sc_handshake_ok,
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(long long)ktime_to_us(sc->sc_tv_timer),
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(long long)ktime_to_us(sc->sc_tv_data_ready),
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(long long)ktime_to_us(sc->sc_tv_advance_start),
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(long long)ktime_to_us(sc->sc_tv_advance_stop),
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(long long)ktime_to_us(sc->sc_tv_func_start),
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(long long)ktime_to_us(sc->sc_tv_func_stop),
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sc->sc_msg_key,
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sc->sc_msg_type);
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}
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static int sc_seq_show(struct seq_file *seq, void *v)
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{
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struct o2net_sock_debug *sd = seq->private;
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struct o2net_sock_container *sc, *dummy_sc = sd->dbg_sock;
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spin_lock(&o2net_debug_lock);
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sc = next_sc(dummy_sc);
|
||
|
|
|
||
|
|
if (sc) {
|
||
|
|
if (sd->dbg_ctxt == SHOW_SOCK_CONTAINERS)
|
||
|
|
sc_show_sock_container(seq, sc);
|
||
|
|
else
|
||
|
|
sc_show_sock_stats(seq, sc);
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_unlock(&o2net_debug_lock);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void sc_seq_stop(struct seq_file *seq, void *v)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct seq_operations sc_seq_ops = {
|
||
|
|
.start = sc_seq_start,
|
||
|
|
.next = sc_seq_next,
|
||
|
|
.stop = sc_seq_stop,
|
||
|
|
.show = sc_seq_show,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sc_common_open(struct file *file, int ctxt)
|
||
|
|
{
|
||
|
|
struct o2net_sock_debug *sd;
|
||
|
|
struct o2net_sock_container *dummy_sc;
|
||
|
|
|
||
|
|
dummy_sc = kzalloc(sizeof(*dummy_sc), GFP_KERNEL);
|
||
|
|
if (!dummy_sc)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
sd = __seq_open_private(file, &sc_seq_ops, sizeof(*sd));
|
||
|
|
if (!sd) {
|
||
|
|
kfree(dummy_sc);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
sd->dbg_ctxt = ctxt;
|
||
|
|
sd->dbg_sock = dummy_sc;
|
||
|
|
|
||
|
|
o2net_debug_add_sc(dummy_sc);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sc_fop_release(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
struct seq_file *seq = file->private_data;
|
||
|
|
struct o2net_sock_debug *sd = seq->private;
|
||
|
|
struct o2net_sock_container *dummy_sc = sd->dbg_sock;
|
||
|
|
|
||
|
|
o2net_debug_del_sc(dummy_sc);
|
||
|
|
kfree(dummy_sc);
|
||
|
|
return seq_release_private(inode, file);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int stats_fop_open(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
return sc_common_open(file, SHOW_SOCK_STATS);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations stats_seq_fops = {
|
||
|
|
.open = stats_fop_open,
|
||
|
|
.read = seq_read,
|
||
|
|
.llseek = seq_lseek,
|
||
|
|
.release = sc_fop_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sc_fop_open(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
return sc_common_open(file, SHOW_SOCK_CONTAINERS);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations sc_seq_fops = {
|
||
|
|
.open = sc_fop_open,
|
||
|
|
.read = seq_read,
|
||
|
|
.llseek = seq_lseek,
|
||
|
|
.release = sc_fop_release,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int o2net_fill_bitmap(char *buf, int len)
|
||
|
|
{
|
||
|
|
unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)];
|
||
|
|
int i = -1, out = 0;
|
||
|
|
|
||
|
|
o2net_fill_node_map(map, O2NM_MAX_NODES);
|
||
|
|
|
||
|
|
while ((i = find_next_bit(map, O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES)
|
||
|
|
out += scnprintf(buf + out, PAGE_SIZE - out, "%d ", i);
|
||
|
|
out += scnprintf(buf + out, PAGE_SIZE - out, "\n");
|
||
|
|
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int nodes_fop_open(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
char *buf;
|
||
|
|
|
||
|
|
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
||
|
|
if (!buf)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
i_size_write(inode, o2net_fill_bitmap(buf, PAGE_SIZE));
|
||
|
|
|
||
|
|
file->private_data = buf;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int o2net_debug_release(struct inode *inode, struct file *file)
|
||
|
|
{
|
||
|
|
kfree(file->private_data);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t o2net_debug_read(struct file *file, char __user *buf,
|
||
|
|
size_t nbytes, loff_t *ppos)
|
||
|
|
{
|
||
|
|
return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
|
||
|
|
i_size_read(file->f_mapping->host));
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations nodes_fops = {
|
||
|
|
.open = nodes_fop_open,
|
||
|
|
.release = o2net_debug_release,
|
||
|
|
.read = o2net_debug_read,
|
||
|
|
.llseek = generic_file_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
void o2net_debugfs_exit(void)
|
||
|
|
{
|
||
|
|
debugfs_remove_recursive(o2net_dentry);
|
||
|
|
}
|
||
|
|
|
||
|
|
void o2net_debugfs_init(void)
|
||
|
|
{
|
||
|
|
umode_t mode = S_IFREG|S_IRUSR;
|
||
|
|
|
||
|
|
o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL);
|
||
|
|
|
||
|
|
debugfs_create_file(NST_DEBUG_NAME, mode, o2net_dentry, NULL,
|
||
|
|
&nst_seq_fops);
|
||
|
|
debugfs_create_file(SC_DEBUG_NAME, mode, o2net_dentry, NULL,
|
||
|
|
&sc_seq_fops);
|
||
|
|
debugfs_create_file(STATS_DEBUG_NAME, mode, o2net_dentry, NULL,
|
||
|
|
&stats_seq_fops);
|
||
|
|
debugfs_create_file(NODES_DEBUG_NAME, mode, o2net_dentry, NULL,
|
||
|
|
&nodes_fops);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_DEBUG_FS */
|