444 lines
10 KiB
C
444 lines
10 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*
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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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static struct dentry *o2net_dentry;
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static struct dentry *sc_dentry;
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static struct dentry *nst_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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spin_lock(&o2net_debug_lock);
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nst = next_nst(dummy_nst);
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if (nst != NULL) {
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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: %lu.%ld\n"
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" send start: %lu.%ld\n"
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" wait start: %lu.%ld\n",
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nst, (unsigned long)nst->st_task->pid,
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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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nst->st_sock_time.tv_sec,
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(long)nst->st_sock_time.tv_usec,
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nst->st_send_time.tv_sec,
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(long)nst->st_send_time.tv_usec,
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nst->st_status_time.tv_sec,
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(long)nst->st_status_time.tv_usec);
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}
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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 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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struct seq_file *seq;
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int ret;
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dummy_nst = kmalloc(sizeof(struct o2net_send_tracking), GFP_KERNEL);
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if (dummy_nst == NULL) {
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ret = -ENOMEM;
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goto out;
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}
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dummy_nst->st_task = NULL;
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ret = seq_open(file, &nst_seq_ops);
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if (ret)
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goto out;
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seq = file->private_data;
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seq->private = dummy_nst;
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o2net_debug_add_nst(dummy_nst);
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dummy_nst = NULL;
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out:
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kfree(dummy_nst);
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return ret;
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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 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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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_container *sc, *dummy_sc = seq->private;
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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_container *sc, *dummy_sc = seq->private;
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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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#define TV_SEC_USEC(TV) TV.tv_sec, (long)TV.tv_usec
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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_container *sc, *dummy_sc = seq->private;
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spin_lock(&o2net_debug_lock);
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sc = next_sc(dummy_sc);
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if (sc != NULL) {
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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->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->saddr;
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daddr = (__force __be32)inet->daddr;
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sport = (__force __be16)inet->sport;
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dport = (__force __be16)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: %lu.%ld\n"
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" data ready: %lu.%ld\n"
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" advance start: %lu.%ld\n"
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" advance stop: %lu.%ld\n"
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" func start: %lu.%ld\n"
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" func stop: %lu.%ld\n"
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" func key: %u\n"
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" func type: %u\n",
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sc,
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atomic_read(&sc->sc_kref.refcount),
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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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TV_SEC_USEC(sc->sc_tv_timer),
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TV_SEC_USEC(sc->sc_tv_data_ready),
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TV_SEC_USEC(sc->sc_tv_advance_start),
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TV_SEC_USEC(sc->sc_tv_advance_stop),
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TV_SEC_USEC(sc->sc_tv_func_start),
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TV_SEC_USEC(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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spin_unlock(&o2net_debug_lock);
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return 0;
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}
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static void sc_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static struct seq_operations sc_seq_ops = {
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.start = sc_seq_start,
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.next = sc_seq_next,
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.stop = sc_seq_stop,
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.show = sc_seq_show,
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};
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static int sc_fop_open(struct inode *inode, struct file *file)
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{
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struct o2net_sock_container *dummy_sc;
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struct seq_file *seq;
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int ret;
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dummy_sc = kmalloc(sizeof(struct o2net_sock_container), GFP_KERNEL);
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if (dummy_sc == NULL) {
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ret = -ENOMEM;
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goto out;
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}
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dummy_sc->sc_page = NULL;
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ret = seq_open(file, &sc_seq_ops);
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if (ret)
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goto out;
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seq = file->private_data;
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seq->private = dummy_sc;
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o2net_debug_add_sc(dummy_sc);
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dummy_sc = NULL;
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out:
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kfree(dummy_sc);
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return ret;
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}
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static int sc_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_sock_container *dummy_sc = seq->private;
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o2net_debug_del_sc(dummy_sc);
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return seq_release_private(inode, file);
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}
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static struct file_operations sc_seq_fops = {
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.open = sc_fop_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = sc_fop_release,
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};
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int o2net_debugfs_init(void)
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{
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o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL);
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if (!o2net_dentry) {
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mlog_errno(-ENOMEM);
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goto bail;
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}
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nst_dentry = debugfs_create_file(NST_DEBUG_NAME, S_IFREG|S_IRUSR,
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o2net_dentry, NULL,
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&nst_seq_fops);
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if (!nst_dentry) {
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mlog_errno(-ENOMEM);
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goto bail;
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}
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sc_dentry = debugfs_create_file(SC_DEBUG_NAME, S_IFREG|S_IRUSR,
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o2net_dentry, NULL,
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&sc_seq_fops);
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if (!sc_dentry) {
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mlog_errno(-ENOMEM);
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goto bail;
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}
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return 0;
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bail:
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if (sc_dentry)
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debugfs_remove(sc_dentry);
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if (nst_dentry)
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debugfs_remove(nst_dentry);
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if (o2net_dentry)
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debugfs_remove(o2net_dentry);
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return -ENOMEM;
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}
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void o2net_debugfs_exit(void)
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{
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if (sc_dentry)
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debugfs_remove(sc_dentry);
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if (nst_dentry)
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debugfs_remove(nst_dentry);
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if (o2net_dentry)
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debugfs_remove(o2net_dentry);
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}
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#endif /* CONFIG_DEBUG_FS */
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