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net/batman-adv/bat_debugfs.c
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/* |
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* Copyright (C) 2010-2011 B.A.T.M.A.N. contributors: |
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* * Marek Lindner * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA * */ #include "main.h" #include <linux/debugfs.h> #include "bat_debugfs.h" #include "translation-table.h" #include "originator.h" #include "hard-interface.h" #include "gateway_common.h" #include "gateway_client.h" #include "soft-interface.h" #include "vis.h" #include "icmp_socket.h" static struct dentry *bat_debugfs; #ifdef CONFIG_BATMAN_ADV_DEBUG #define LOG_BUFF_MASK (log_buff_len-1) #define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK]) static int log_buff_len = LOG_BUF_LEN; static void emit_log_char(struct debug_log *debug_log, char c) { LOG_BUFF(debug_log->log_end) = c; debug_log->log_end++; if (debug_log->log_end - debug_log->log_start > log_buff_len) debug_log->log_start = debug_log->log_end - log_buff_len; } |
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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; static char debug_log_buf[256]; char *p; if (!debug_log) return 0; spin_lock_bh(&debug_log->lock); 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); for (p = debug_log_buf; *p != 0; p++) emit_log_char(debug_log, *p); spin_unlock_bh(&debug_log->lock); wake_up(&debug_log->queue_wait); return 0; } |
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int debug_log(struct bat_priv *bat_priv, const char *fmt, ...) |
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{ va_list args; char tmp_log_buf[256]; va_start(args, fmt); vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args); |
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fdebug_log(bat_priv->debug_log, "[%10lu] %s", |
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(jiffies / HZ), tmp_log_buf); va_end(args); return 0; } static int log_open(struct inode *inode, struct file *file) { nonseekable_open(inode, file); file->private_data = inode->i_private; inc_module_count(); return 0; } static int log_release(struct inode *inode, struct file *file) { dec_module_count(); return 0; } static ssize_t log_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { struct bat_priv *bat_priv = file->private_data; struct debug_log *debug_log = bat_priv->debug_log; int error, i = 0; char c; if ((file->f_flags & O_NONBLOCK) && !(debug_log->log_end - debug_log->log_start)) return -EAGAIN; |
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if (!buf) |
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return -EINVAL; if (count == 0) return 0; if (!access_ok(VERIFY_WRITE, buf, count)) return -EFAULT; error = wait_event_interruptible(debug_log->queue_wait, (debug_log->log_start - debug_log->log_end)); if (error) return error; spin_lock_bh(&debug_log->lock); while ((!error) && (i < count) && (debug_log->log_start != debug_log->log_end)) { c = LOG_BUFF(debug_log->log_start); debug_log->log_start++; spin_unlock_bh(&debug_log->lock); error = __put_user(c, buf); spin_lock_bh(&debug_log->lock); buf++; i++; } spin_unlock_bh(&debug_log->lock); if (!error) return i; return error; } static unsigned int log_poll(struct file *file, poll_table *wait) { struct bat_priv *bat_priv = file->private_data; struct debug_log *debug_log = bat_priv->debug_log; poll_wait(file, &debug_log->queue_wait, wait); if (debug_log->log_end - debug_log->log_start) return POLLIN | POLLRDNORM; return 0; } static const struct file_operations log_fops = { .open = log_open, .release = log_release, .read = log_read, .poll = log_poll, .llseek = no_llseek, }; static int debug_log_setup(struct bat_priv *bat_priv) { struct dentry *d; if (!bat_priv->debug_dir) 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) goto err; spin_lock_init(&bat_priv->debug_log->lock); init_waitqueue_head(&bat_priv->debug_log->queue_wait); d = debugfs_create_file("log", S_IFREG | S_IRUSR, bat_priv->debug_dir, bat_priv, &log_fops); if (d) goto err; return 0; err: return 1; } static void debug_log_cleanup(struct bat_priv *bat_priv) { kfree(bat_priv->debug_log); bat_priv->debug_log = NULL; } #else /* CONFIG_BATMAN_ADV_DEBUG */ static int debug_log_setup(struct bat_priv *bat_priv) { bat_priv->debug_log = NULL; return 0; } static void debug_log_cleanup(struct bat_priv *bat_priv) { return; } #endif static int originators_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; return single_open(file, orig_seq_print_text, net_dev); } static int gateways_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; return single_open(file, gw_client_seq_print_text, net_dev); } static int softif_neigh_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; return single_open(file, softif_neigh_seq_print_text, net_dev); } static int transtable_global_open(struct inode *inode, struct file *file) { 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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} static int transtable_local_open(struct inode *inode, struct file *file) { 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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} static int vis_data_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; return single_open(file, vis_seq_print_text, net_dev); } struct bat_debuginfo { struct attribute attr; const struct file_operations fops; }; #define BAT_DEBUGINFO(_name, _mode, _open) \ struct bat_debuginfo bat_debuginfo_##_name = { \ .attr = { .name = __stringify(_name), \ .mode = _mode, }, \ .fops = { .owner = THIS_MODULE, \ .open = _open, \ .read = seq_read, \ .llseek = seq_lseek, \ .release = single_release, \ } \ }; static BAT_DEBUGINFO(originators, S_IRUGO, originators_open); static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open); static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open); static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open); static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open); static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open); static struct bat_debuginfo *mesh_debuginfos[] = { &bat_debuginfo_originators, &bat_debuginfo_gateways, &bat_debuginfo_softif_neigh, &bat_debuginfo_transtable_global, &bat_debuginfo_transtable_local, &bat_debuginfo_vis_data, NULL, }; void debugfs_init(void) { bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL); if (bat_debugfs == ERR_PTR(-ENODEV)) bat_debugfs = NULL; } void debugfs_destroy(void) { if (bat_debugfs) { debugfs_remove_recursive(bat_debugfs); bat_debugfs = NULL; } } int debugfs_add_meshif(struct net_device *dev) { struct bat_priv *bat_priv = netdev_priv(dev); struct bat_debuginfo **bat_debug; struct dentry *file; if (!bat_debugfs) goto out; bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs); if (!bat_priv->debug_dir) goto out; bat_socket_setup(bat_priv); debug_log_setup(bat_priv); for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) { file = debugfs_create_file(((*bat_debug)->attr).name, S_IFREG | ((*bat_debug)->attr).mode, bat_priv->debug_dir, dev, &(*bat_debug)->fops); if (!file) { bat_err(dev, "Can't add debugfs file: %s/%s ", dev->name, ((*bat_debug)->attr).name); goto rem_attr; } } return 0; rem_attr: debugfs_remove_recursive(bat_priv->debug_dir); bat_priv->debug_dir = NULL; out: #ifdef CONFIG_DEBUG_FS return -ENOMEM; #else return 0; #endif /* CONFIG_DEBUG_FS */ } void debugfs_del_meshif(struct net_device *dev) { struct bat_priv *bat_priv = netdev_priv(dev); debug_log_cleanup(bat_priv); if (bat_debugfs) { debugfs_remove_recursive(bat_priv->debug_dir); bat_priv->debug_dir = NULL; } } |