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508 lines
12 KiB
508 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* -*- 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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#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); |
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if (sc) { |
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if (sd->dbg_ctxt == SHOW_SOCK_CONTAINERS) |
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sc_show_sock_container(seq, sc); |
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else |
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sc_show_sock_stats(seq, sc); |
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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 const 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_common_open(struct file *file, int ctxt) |
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{ |
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struct o2net_sock_debug *sd; |
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struct o2net_sock_container *dummy_sc; |
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dummy_sc = kzalloc(sizeof(*dummy_sc), GFP_KERNEL); |
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if (!dummy_sc) |
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return -ENOMEM; |
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sd = __seq_open_private(file, &sc_seq_ops, sizeof(*sd)); |
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if (!sd) { |
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kfree(dummy_sc); |
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return -ENOMEM; |
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} |
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sd->dbg_ctxt = ctxt; |
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sd->dbg_sock = dummy_sc; |
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o2net_debug_add_sc(dummy_sc); |
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return 0; |
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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_debug *sd = seq->private; |
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struct o2net_sock_container *dummy_sc = sd->dbg_sock; |
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o2net_debug_del_sc(dummy_sc); |
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kfree(dummy_sc); |
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return seq_release_private(inode, file); |
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} |
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static int stats_fop_open(struct inode *inode, struct file *file) |
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{ |
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return sc_common_open(file, SHOW_SOCK_STATS); |
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} |
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static const struct file_operations stats_seq_fops = { |
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.open = stats_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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static int sc_fop_open(struct inode *inode, struct file *file) |
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{ |
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return sc_common_open(file, SHOW_SOCK_CONTAINERS); |
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} |
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static const 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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static int o2net_fill_bitmap(char *buf, int len) |
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{ |
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unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
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int i = -1, out = 0; |
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o2net_fill_node_map(map, sizeof(map)); |
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while ((i = find_next_bit(map, O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES) |
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out += scnprintf(buf + out, PAGE_SIZE - out, "%d ", i); |
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out += scnprintf(buf + out, PAGE_SIZE - out, "\n"); |
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return out; |
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} |
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static int nodes_fop_open(struct inode *inode, struct file *file) |
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{ |
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char *buf; |
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buf = kmalloc(PAGE_SIZE, GFP_KERNEL); |
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if (!buf) |
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return -ENOMEM; |
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i_size_write(inode, o2net_fill_bitmap(buf, PAGE_SIZE)); |
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file->private_data = buf; |
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return 0; |
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} |
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static int o2net_debug_release(struct inode *inode, struct file *file) |
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{ |
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kfree(file->private_data); |
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return 0; |
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} |
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static ssize_t o2net_debug_read(struct file *file, char __user *buf, |
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size_t nbytes, loff_t *ppos) |
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{ |
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return simple_read_from_buffer(buf, nbytes, ppos, file->private_data, |
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i_size_read(file->f_mapping->host)); |
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} |
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static const struct file_operations nodes_fops = { |
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.open = nodes_fop_open, |
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.release = o2net_debug_release, |
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.read = o2net_debug_read, |
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.llseek = generic_file_llseek, |
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}; |
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void o2net_debugfs_exit(void) |
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{ |
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debugfs_remove_recursive(o2net_dentry); |
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} |
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void o2net_debugfs_init(void) |
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{ |
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umode_t mode = S_IFREG|S_IRUSR; |
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o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL); |
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debugfs_create_file(NST_DEBUG_NAME, mode, o2net_dentry, NULL, |
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&nst_seq_fops); |
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debugfs_create_file(SC_DEBUG_NAME, mode, o2net_dentry, NULL, |
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&sc_seq_fops); |
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debugfs_create_file(STATS_DEBUG_NAME, mode, o2net_dentry, NULL, |
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&stats_seq_fops); |
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debugfs_create_file(NODES_DEBUG_NAME, mode, o2net_dentry, NULL, |
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&nodes_fops); |
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} |
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#endif /* CONFIG_DEBUG_FS */
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