mirror of https://gitee.com/openkylin/linux.git
389 lines
9.0 KiB
C
389 lines
9.0 KiB
C
/*
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* Copyright (C) 2010-2012 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner
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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 version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* 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 License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*
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*/
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#include "main.h"
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#include <linux/debugfs.h>
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#include "bat_debugfs.h"
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#include "translation-table.h"
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#include "originator.h"
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#include "hard-interface.h"
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#include "gateway_common.h"
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#include "gateway_client.h"
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#include "soft-interface.h"
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#include "vis.h"
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#include "icmp_socket.h"
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#include "bridge_loop_avoidance.h"
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static struct dentry *bat_debugfs;
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#ifdef CONFIG_BATMAN_ADV_DEBUG
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#define LOG_BUFF_MASK (log_buff_len-1)
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#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
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static int log_buff_len = LOG_BUF_LEN;
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static void emit_log_char(struct debug_log *debug_log, char c)
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{
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LOG_BUFF(debug_log->log_end) = c;
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debug_log->log_end++;
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if (debug_log->log_end - debug_log->log_start > log_buff_len)
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debug_log->log_start = debug_log->log_end - log_buff_len;
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}
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__printf(2, 3)
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static int fdebug_log(struct debug_log *debug_log, const char *fmt, ...)
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{
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va_list args;
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static char debug_log_buf[256];
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char *p;
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if (!debug_log)
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return 0;
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spin_lock_bh(&debug_log->lock);
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va_start(args, fmt);
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vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args);
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va_end(args);
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for (p = debug_log_buf; *p != 0; p++)
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emit_log_char(debug_log, *p);
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spin_unlock_bh(&debug_log->lock);
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wake_up(&debug_log->queue_wait);
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return 0;
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}
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int debug_log(struct bat_priv *bat_priv, const char *fmt, ...)
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{
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va_list args;
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char tmp_log_buf[256];
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va_start(args, fmt);
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vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
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fdebug_log(bat_priv->debug_log, "[%10u] %s",
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jiffies_to_msecs(jiffies), tmp_log_buf);
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va_end(args);
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return 0;
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}
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static int log_open(struct inode *inode, struct file *file)
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{
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nonseekable_open(inode, file);
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file->private_data = inode->i_private;
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inc_module_count();
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return 0;
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}
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static int log_release(struct inode *inode, struct file *file)
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{
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dec_module_count();
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return 0;
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}
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static ssize_t log_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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struct bat_priv *bat_priv = file->private_data;
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struct debug_log *debug_log = bat_priv->debug_log;
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int error, i = 0;
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char c;
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if ((file->f_flags & O_NONBLOCK) &&
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!(debug_log->log_end - debug_log->log_start))
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return -EAGAIN;
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if (!buf)
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return -EINVAL;
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if (count == 0)
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return 0;
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if (!access_ok(VERIFY_WRITE, buf, count))
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return -EFAULT;
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error = wait_event_interruptible(debug_log->queue_wait,
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(debug_log->log_start - debug_log->log_end));
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if (error)
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return error;
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spin_lock_bh(&debug_log->lock);
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while ((!error) && (i < count) &&
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(debug_log->log_start != debug_log->log_end)) {
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c = LOG_BUFF(debug_log->log_start);
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debug_log->log_start++;
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spin_unlock_bh(&debug_log->lock);
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error = __put_user(c, buf);
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spin_lock_bh(&debug_log->lock);
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buf++;
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i++;
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}
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spin_unlock_bh(&debug_log->lock);
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if (!error)
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return i;
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return error;
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}
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static unsigned int log_poll(struct file *file, poll_table *wait)
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{
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struct bat_priv *bat_priv = file->private_data;
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struct debug_log *debug_log = bat_priv->debug_log;
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poll_wait(file, &debug_log->queue_wait, wait);
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if (debug_log->log_end - debug_log->log_start)
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return POLLIN | POLLRDNORM;
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return 0;
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}
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static const struct file_operations log_fops = {
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.open = log_open,
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.release = log_release,
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.read = log_read,
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.poll = log_poll,
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.llseek = no_llseek,
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};
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static int debug_log_setup(struct bat_priv *bat_priv)
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{
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struct dentry *d;
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if (!bat_priv->debug_dir)
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goto err;
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bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC);
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if (!bat_priv->debug_log)
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goto err;
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spin_lock_init(&bat_priv->debug_log->lock);
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init_waitqueue_head(&bat_priv->debug_log->queue_wait);
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d = debugfs_create_file("log", S_IFREG | S_IRUSR,
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bat_priv->debug_dir, bat_priv, &log_fops);
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if (d)
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goto err;
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return 0;
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err:
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return 1;
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}
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static void debug_log_cleanup(struct bat_priv *bat_priv)
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{
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kfree(bat_priv->debug_log);
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bat_priv->debug_log = NULL;
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}
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#else /* CONFIG_BATMAN_ADV_DEBUG */
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static int debug_log_setup(struct bat_priv *bat_priv)
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{
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bat_priv->debug_log = NULL;
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return 0;
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}
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static void debug_log_cleanup(struct bat_priv *bat_priv)
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{
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return;
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}
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#endif
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static int bat_algorithms_open(struct inode *inode, struct file *file)
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{
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return single_open(file, bat_algo_seq_print_text, NULL);
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}
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static int originators_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, orig_seq_print_text, net_dev);
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}
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static int gateways_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, gw_client_seq_print_text, net_dev);
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}
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static int transtable_global_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, tt_global_seq_print_text, net_dev);
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}
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#ifdef CONFIG_BATMAN_ADV_BLA
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static int bla_claim_table_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, bla_claim_table_seq_print_text, net_dev);
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}
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#endif
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static int transtable_local_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, tt_local_seq_print_text, net_dev);
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}
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static int vis_data_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, vis_seq_print_text, net_dev);
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}
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struct bat_debuginfo {
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struct attribute attr;
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const struct file_operations fops;
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};
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#define BAT_DEBUGINFO(_name, _mode, _open) \
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struct bat_debuginfo bat_debuginfo_##_name = { \
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.attr = { .name = __stringify(_name), \
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.mode = _mode, }, \
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.fops = { .owner = THIS_MODULE, \
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.open = _open, \
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.read = seq_read, \
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.llseek = seq_lseek, \
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.release = single_release, \
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} \
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};
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static BAT_DEBUGINFO(routing_algos, S_IRUGO, bat_algorithms_open);
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static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
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static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
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static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
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#ifdef CONFIG_BATMAN_ADV_BLA
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static BAT_DEBUGINFO(bla_claim_table, S_IRUGO, bla_claim_table_open);
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#endif
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static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
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static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
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static struct bat_debuginfo *mesh_debuginfos[] = {
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&bat_debuginfo_originators,
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&bat_debuginfo_gateways,
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&bat_debuginfo_transtable_global,
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#ifdef CONFIG_BATMAN_ADV_BLA
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&bat_debuginfo_bla_claim_table,
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#endif
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&bat_debuginfo_transtable_local,
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&bat_debuginfo_vis_data,
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NULL,
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};
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void debugfs_init(void)
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{
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struct bat_debuginfo *bat_debug;
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struct dentry *file;
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bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
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if (bat_debugfs == ERR_PTR(-ENODEV))
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bat_debugfs = NULL;
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if (!bat_debugfs)
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goto out;
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bat_debug = &bat_debuginfo_routing_algos;
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file = debugfs_create_file(bat_debug->attr.name,
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S_IFREG | bat_debug->attr.mode,
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bat_debugfs, NULL, &bat_debug->fops);
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if (!file)
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pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name);
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out:
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return;
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}
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void debugfs_destroy(void)
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{
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if (bat_debugfs) {
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debugfs_remove_recursive(bat_debugfs);
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bat_debugfs = NULL;
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}
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}
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int debugfs_add_meshif(struct net_device *dev)
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{
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struct bat_priv *bat_priv = netdev_priv(dev);
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struct bat_debuginfo **bat_debug;
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struct dentry *file;
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if (!bat_debugfs)
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goto out;
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bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
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if (!bat_priv->debug_dir)
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goto out;
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bat_socket_setup(bat_priv);
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debug_log_setup(bat_priv);
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for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
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file = debugfs_create_file(((*bat_debug)->attr).name,
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S_IFREG | ((*bat_debug)->attr).mode,
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bat_priv->debug_dir,
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dev, &(*bat_debug)->fops);
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if (!file) {
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bat_err(dev, "Can't add debugfs file: %s/%s\n",
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dev->name, ((*bat_debug)->attr).name);
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goto rem_attr;
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}
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}
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return 0;
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rem_attr:
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debugfs_remove_recursive(bat_priv->debug_dir);
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bat_priv->debug_dir = NULL;
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out:
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#ifdef CONFIG_DEBUG_FS
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return -ENOMEM;
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#else
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return 0;
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#endif /* CONFIG_DEBUG_FS */
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}
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void debugfs_del_meshif(struct net_device *dev)
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{
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struct bat_priv *bat_priv = netdev_priv(dev);
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debug_log_cleanup(bat_priv);
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if (bat_debugfs) {
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debugfs_remove_recursive(bat_priv->debug_dir);
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bat_priv->debug_dir = NULL;
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}
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}
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