| /* |
| * Copyright (C) 2010-2012 B.A.T.M.A.N. contributors: |
| * |
| * 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" |
| #include "bridge_loop_avoidance.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; |
| } |
| |
| __printf(2, 3) |
| static int fdebug_log(struct debug_log *debug_log, const char *fmt, ...) |
| { |
| 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); |
| vscnprintf(debug_log_buf, sizeof(debug_log_buf), fmt, args); |
| 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; |
| } |
| |
| int batadv_debug_log(struct bat_priv *bat_priv, const char *fmt, ...) |
| { |
| va_list args; |
| char tmp_log_buf[256]; |
| |
| va_start(args, fmt); |
| vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args); |
| fdebug_log(bat_priv->debug_log, "[%10u] %s", |
| jiffies_to_msecs(jiffies), 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; |
| |
| if (!buf) |
| 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; |
| |
| bat_priv->debug_log = kzalloc(sizeof(*bat_priv->debug_log), GFP_ATOMIC); |
| 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 -ENOMEM; |
| } |
| |
| 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 bat_algorithms_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, bat_algo_seq_print_text, NULL); |
| } |
| |
| 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 transtable_global_open(struct inode *inode, struct file *file) |
| { |
| struct net_device *net_dev = (struct net_device *)inode->i_private; |
| return single_open(file, tt_global_seq_print_text, net_dev); |
| } |
| |
| #ifdef CONFIG_BATMAN_ADV_BLA |
| static int bla_claim_table_open(struct inode *inode, struct file *file) |
| { |
| struct net_device *net_dev = (struct net_device *)inode->i_private; |
| return single_open(file, bla_claim_table_seq_print_text, net_dev); |
| } |
| #endif |
| |
| static int transtable_local_open(struct inode *inode, struct file *file) |
| { |
| struct net_device *net_dev = (struct net_device *)inode->i_private; |
| return single_open(file, tt_local_seq_print_text, net_dev); |
| } |
| |
| 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(routing_algos, S_IRUGO, bat_algorithms_open); |
| static BAT_DEBUGINFO(originators, S_IRUGO, originators_open); |
| static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open); |
| static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open); |
| #ifdef CONFIG_BATMAN_ADV_BLA |
| static BAT_DEBUGINFO(bla_claim_table, S_IRUGO, bla_claim_table_open); |
| #endif |
| 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_transtable_global, |
| #ifdef CONFIG_BATMAN_ADV_BLA |
| &bat_debuginfo_bla_claim_table, |
| #endif |
| &bat_debuginfo_transtable_local, |
| &bat_debuginfo_vis_data, |
| NULL, |
| }; |
| |
| void batadv_debugfs_init(void) |
| { |
| struct bat_debuginfo *bat_debug; |
| struct dentry *file; |
| |
| bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL); |
| if (bat_debugfs == ERR_PTR(-ENODEV)) |
| bat_debugfs = NULL; |
| |
| if (!bat_debugfs) |
| goto out; |
| |
| bat_debug = &bat_debuginfo_routing_algos; |
| file = debugfs_create_file(bat_debug->attr.name, |
| S_IFREG | bat_debug->attr.mode, |
| bat_debugfs, NULL, &bat_debug->fops); |
| if (!file) |
| pr_err("Can't add debugfs file: %s\n", bat_debug->attr.name); |
| |
| out: |
| return; |
| } |
| |
| void batadv_debugfs_destroy(void) |
| { |
| if (bat_debugfs) { |
| debugfs_remove_recursive(bat_debugfs); |
| bat_debugfs = NULL; |
| } |
| } |
| |
| int batadv_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; |
| |
| if (bat_socket_setup(bat_priv) < 0) |
| goto rem_attr; |
| |
| if (debug_log_setup(bat_priv) < 0) |
| goto rem_attr; |
| |
| 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\n", |
| 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 batadv_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; |
| } |
| } |