net/llc/llc_proc.c - kernel/msm-4.19 - Gitiles

 /*
  * proc_llc.c - proc interface for LLC
  *
  * Copyright (c) 2001 by Jay Schulist <jschlst@samba.org>
  *		 2002-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  *
  * This program can be redistributed or modified under the terms of the
  * GNU General Public License as published by the Free Software Foundation.
  * This program is distributed without any warranty or implied warranty
  * of merchantability or fitness for a particular purpose.
  *
  * See the GNU General Public License for more details.
  */

 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/proc_fs.h>
 #include <linux/errno.h>
 #include <linux/seq_file.h>
 #include <linux/export.h>
 #include <net/net_namespace.h>
 #include <net/sock.h>
 #include <net/llc.h>
 #include <net/llc_c_ac.h>
 #include <net/llc_c_ev.h>
 #include <net/llc_c_st.h>
 #include <net/llc_conn.h>

 static void llc_ui_format_mac(struct seq_file *seq, u8 *addr)
 {
 	seq_printf(seq, "%pM", addr);
 }

 static struct sock *llc_get_sk_idx(loff_t pos)
 {
 	struct llc_sap *sap;
 	struct sock *sk = NULL;
 	int i;

 	list_for_each_entry_rcu(sap, &llc_sap_list, node) {
 		spin_lock_bh(&sap->sk_lock);
 		for (i = 0; i < LLC_SK_LADDR_HASH_ENTRIES; i++) {
 			struct hlist_nulls_head *head = &sap->sk_laddr_hash[i];
 			struct hlist_nulls_node *node;

 			sk_nulls_for_each(sk, node, head) {
 				if (!pos)
 					goto found; /* keep the lock */
 				--pos;
 			}
 		}
 		spin_unlock_bh(&sap->sk_lock);
 	}
 	sk = NULL;
 found:
 	return sk;
 }

 static void *llc_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	loff_t l = *pos;

 	rcu_read_lock_bh();
 	return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN;
 }

 static struct sock *laddr_hash_next(struct llc_sap *sap, int bucket)
 {
 	struct hlist_nulls_node *node;
 	struct sock *sk = NULL;

 	while (++bucket < LLC_SK_LADDR_HASH_ENTRIES)
 		sk_nulls_for_each(sk, node, &sap->sk_laddr_hash[bucket])
 			goto out;

 out:
 	return sk;
 }

 static void *llc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
 	struct sock* sk, *next;
 	struct llc_sock *llc;
 	struct llc_sap *sap;

 	++*pos;
 	if (v == SEQ_START_TOKEN) {
 		sk = llc_get_sk_idx(0);
 		goto out;
 	}
 	sk = v;
 	next = sk_nulls_next(sk);
 	if (next) {
 		sk = next;
 		goto out;
 	}
 	llc = llc_sk(sk);
 	sap = llc->sap;
 	sk = laddr_hash_next(sap, llc_sk_laddr_hashfn(sap, &llc->laddr));
 	if (sk)
 		goto out;
 	spin_unlock_bh(&sap->sk_lock);
 	list_for_each_entry_continue_rcu(sap, &llc_sap_list, node) {
 		spin_lock_bh(&sap->sk_lock);
 		sk = laddr_hash_next(sap, -1);
 		if (sk)
 			break; /* keep the lock */
 		spin_unlock_bh(&sap->sk_lock);
 	}
 out:
 	return sk;
 }

 static void llc_seq_stop(struct seq_file *seq, void *v)
 {
 	if (v && v != SEQ_START_TOKEN) {
 		struct sock *sk = v;
 		struct llc_sock *llc = llc_sk(sk);
 		struct llc_sap *sap = llc->sap;

 		spin_unlock_bh(&sap->sk_lock);
 	}
 	rcu_read_unlock_bh();
 }

 static int llc_seq_socket_show(struct seq_file *seq, void *v)
 {
 	struct sock* sk;
 	struct llc_sock *llc;

 	if (v == SEQ_START_TOKEN) {
 		seq_puts(seq, "SKt Mc local_mac_sap        remote_mac_sap   "
 			      "    tx_queue rx_queue st uid link\n");
 		goto out;
 	}
 	sk = v;
 	llc = llc_sk(sk);

 	/* FIXME: check if the address is multicast */
 	seq_printf(seq, "%2X  %2X ", sk->sk_type, 0);

 	if (llc->dev)
 		llc_ui_format_mac(seq, llc->dev->dev_addr);
 	else {
 		u8 addr[6] = {0,0,0,0,0,0};
 		llc_ui_format_mac(seq, addr);
 	}
 	seq_printf(seq, "@%02X ", llc->sap->laddr.lsap);
 	llc_ui_format_mac(seq, llc->daddr.mac);
 	seq_printf(seq, "@%02X %8d %8d %2d %3u %4d\n", llc->daddr.lsap,
 		   sk_wmem_alloc_get(sk),
 		   sk_rmem_alloc_get(sk) - llc->copied_seq,
 		   sk->sk_state,
 		   from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
 		   llc->link);
 out:
 	return 0;
 }

 static const char *const llc_conn_state_names[] = {
 	[LLC_CONN_STATE_ADM] =        "adm",
 	[LLC_CONN_STATE_SETUP] =      "setup",
 	[LLC_CONN_STATE_NORMAL] =     "normal",
 	[LLC_CONN_STATE_BUSY] =       "busy",
 	[LLC_CONN_STATE_REJ] =        "rej",
 	[LLC_CONN_STATE_AWAIT] =      "await",
 	[LLC_CONN_STATE_AWAIT_BUSY] = "await_busy",
 	[LLC_CONN_STATE_AWAIT_REJ] =  "await_rej",
 	[LLC_CONN_STATE_D_CONN]	=     "d_conn",
 	[LLC_CONN_STATE_RESET] =      "reset",
 	[LLC_CONN_STATE_ERROR] =      "error",
 	[LLC_CONN_STATE_TEMP] =       "temp",
 };

 static int llc_seq_core_show(struct seq_file *seq, void *v)
 {
 	struct sock* sk;
 	struct llc_sock *llc;

 	if (v == SEQ_START_TOKEN) {
 		seq_puts(seq, "Connection list:\n"
 			      "dsap state      retr txw rxw pf ff sf df rs cs "
 			      "tack tpfc trs tbs blog busr\n");
 		goto out;
 	}
 	sk = v;
 	llc = llc_sk(sk);

 	seq_printf(seq, " %02X  %-10s %3d  %3d %3d %2d %2d %2d %2d %2d %2d "
 			"%4d %4d %3d %3d %4d %4d\n",
 		   llc->daddr.lsap, llc_conn_state_names[llc->state],
 		   llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag,
 		   llc->s_flag, llc->data_flag, llc->remote_busy_flag,
 		   llc->cause_flag, timer_pending(&llc->ack_timer.timer),
 		   timer_pending(&llc->pf_cycle_timer.timer),
 		   timer_pending(&llc->rej_sent_timer.timer),
 		   timer_pending(&llc->busy_state_timer.timer),
 		   !!sk->sk_backlog.tail, !!sk->sk_lock.owned);
 out:
 	return 0;
 }

 static const struct seq_operations llc_seq_socket_ops = {
 	.start  = llc_seq_start,
 	.next   = llc_seq_next,
 	.stop   = llc_seq_stop,
 	.show   = llc_seq_socket_show,
 };

 static const struct seq_operations llc_seq_core_ops = {
 	.start  = llc_seq_start,
 	.next   = llc_seq_next,
 	.stop   = llc_seq_stop,
 	.show   = llc_seq_core_show,
 };

 static int llc_seq_socket_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &llc_seq_socket_ops);
 }

 static int llc_seq_core_open(struct inode *inode, struct file *file)
 {
 	return seq_open(file, &llc_seq_core_ops);
 }

 static const struct file_operations llc_seq_socket_fops = {
 	.open		= llc_seq_socket_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= seq_release,
 };

 static const struct file_operations llc_seq_core_fops = {
 	.open		= llc_seq_core_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= seq_release,
 };

 static struct proc_dir_entry *llc_proc_dir;

 int __init llc_proc_init(void)
 {
 	int rc = -ENOMEM;
 	struct proc_dir_entry *p;

 	llc_proc_dir = proc_mkdir("llc", init_net.proc_net);
 	if (!llc_proc_dir)
 		goto out;

 	p = proc_create("socket", S_IRUGO, llc_proc_dir, &llc_seq_socket_fops);
 	if (!p)
 		goto out_socket;

 	p = proc_create("core", S_IRUGO, llc_proc_dir, &llc_seq_core_fops);
 	if (!p)
 		goto out_core;

 	rc = 0;
 out:
 	return rc;
 out_core:
 	remove_proc_entry("socket", llc_proc_dir);
 out_socket:
 	remove_proc_entry("llc", init_net.proc_net);
 	goto out;
 }

 void llc_proc_exit(void)
 {
 	remove_proc_entry("socket", llc_proc_dir);
 	remove_proc_entry("core", llc_proc_dir);
 	remove_proc_entry("llc", init_net.proc_net);
 }
	/*
	* proc_llc.c - proc interface for LLC
	*
	* Copyright (c) 2001 by Jay Schulist <jschlst@samba.org>
	* 2002-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
	*
	* This program can be redistributed or modified under the terms of the
	* GNU General Public License as published by the Free Software Foundation.
	* This program is distributed without any warranty or implied warranty
	* of merchantability or fitness for a particular purpose.
	*
	* See the GNU General Public License for more details.
	*/

	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/proc_fs.h>
	#include <linux/errno.h>
	#include <linux/seq_file.h>
	#include <linux/export.h>
	#include <net/net_namespace.h>
	#include <net/sock.h>
	#include <net/llc.h>
	#include <net/llc_c_ac.h>
	#include <net/llc_c_ev.h>
	#include <net/llc_c_st.h>
	#include <net/llc_conn.h>

	static void llc_ui_format_mac(struct seq_file seq, u8 addr)
	{
	seq_printf(seq, "%pM", addr);
	}

	static struct sock *llc_get_sk_idx(loff_t pos)
	{
	struct llc_sap *sap;
	struct sock *sk = NULL;
	int i;

	list_for_each_entry_rcu(sap, &llc_sap_list, node) {
	spin_lock_bh(&sap->sk_lock);
	for (i = 0; i < LLC_SK_LADDR_HASH_ENTRIES; i++) {
	struct hlist_nulls_head *head = &sap->sk_laddr_hash[i];
	struct hlist_nulls_node *node;

	sk_nulls_for_each(sk, node, head) {
	if (!pos)
	goto found; /* keep the lock */
	--pos;
	}
	}
	spin_unlock_bh(&sap->sk_lock);
	}
	sk = NULL;
	found:
	return sk;
	}

	static void llc_seq_start(struct seq_file seq, loff_t *pos)
	{
	loff_t l = *pos;

	rcu_read_lock_bh();
	return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN;
	}

	static struct sock laddr_hash_next(struct llc_sap sap, int bucket)
	{
	struct hlist_nulls_node *node;
	struct sock *sk = NULL;

	while (++bucket < LLC_SK_LADDR_HASH_ENTRIES)
	sk_nulls_for_each(sk, node, &sap->sk_laddr_hash[bucket])
	goto out;

	out:
	return sk;
	}

	static void llc_seq_next(struct seq_file seq, void v, loff_t pos)
	{
	struct sock* sk, *next;
	struct llc_sock *llc;
	struct llc_sap *sap;

	++*pos;
	if (v == SEQ_START_TOKEN) {
	sk = llc_get_sk_idx(0);
	goto out;
	}
	sk = v;
	next = sk_nulls_next(sk);
	if (next) {
	sk = next;
	goto out;
	}
	llc = llc_sk(sk);
	sap = llc->sap;
	sk = laddr_hash_next(sap, llc_sk_laddr_hashfn(sap, &llc->laddr));
	if (sk)
	goto out;
	spin_unlock_bh(&sap->sk_lock);
	list_for_each_entry_continue_rcu(sap, &llc_sap_list, node) {
	spin_lock_bh(&sap->sk_lock);
	sk = laddr_hash_next(sap, -1);
	if (sk)
	break; /* keep the lock */
	spin_unlock_bh(&sap->sk_lock);
	}
	out:
	return sk;
	}

	static void llc_seq_stop(struct seq_file seq, void v)
	{
	if (v && v != SEQ_START_TOKEN) {
	struct sock *sk = v;
	struct llc_sock *llc = llc_sk(sk);
	struct llc_sap *sap = llc->sap;

	spin_unlock_bh(&sap->sk_lock);
	}
	rcu_read_unlock_bh();
	}

	static int llc_seq_socket_show(struct seq_file seq, void v)
	{
	struct sock* sk;
	struct llc_sock *llc;

	if (v == SEQ_START_TOKEN) {
	seq_puts(seq, "SKt Mc local_mac_sap remote_mac_sap "
	" tx_queue rx_queue st uid link\n");
	goto out;
	}
	sk = v;
	llc = llc_sk(sk);

	/* FIXME: check if the address is multicast */
	seq_printf(seq, "%2X %2X ", sk->sk_type, 0);

	if (llc->dev)
	llc_ui_format_mac(seq, llc->dev->dev_addr);
	else {
	u8 addr[6] = {0,0,0,0,0,0};
	llc_ui_format_mac(seq, addr);
	}
	seq_printf(seq, "@%02X ", llc->sap->laddr.lsap);
	llc_ui_format_mac(seq, llc->daddr.mac);
	seq_printf(seq, "@%02X %8d %8d %2d %3u %4d\n", llc->daddr.lsap,
	sk_wmem_alloc_get(sk),
	sk_rmem_alloc_get(sk) - llc->copied_seq,
	sk->sk_state,
	from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)),
	llc->link);
	out:
	return 0;
	}

	static const char *const llc_conn_state_names[] = {
	[LLC_CONN_STATE_ADM] = "adm",
	[LLC_CONN_STATE_SETUP] = "setup",
	[LLC_CONN_STATE_NORMAL] = "normal",
	[LLC_CONN_STATE_BUSY] = "busy",
	[LLC_CONN_STATE_REJ] = "rej",
	[LLC_CONN_STATE_AWAIT] = "await",
	[LLC_CONN_STATE_AWAIT_BUSY] = "await_busy",
	[LLC_CONN_STATE_AWAIT_REJ] = "await_rej",
	[LLC_CONN_STATE_D_CONN] = "d_conn",
	[LLC_CONN_STATE_RESET] = "reset",
	[LLC_CONN_STATE_ERROR] = "error",
	[LLC_CONN_STATE_TEMP] = "temp",
	};

	static int llc_seq_core_show(struct seq_file seq, void v)
	{
	struct sock* sk;
	struct llc_sock *llc;

	if (v == SEQ_START_TOKEN) {
	seq_puts(seq, "Connection list:\n"
	"dsap state retr txw rxw pf ff sf df rs cs "
	"tack tpfc trs tbs blog busr\n");
	goto out;
	}
	sk = v;
	llc = llc_sk(sk);

	seq_printf(seq, " %02X %-10s %3d %3d %3d %2d %2d %2d %2d %2d %2d "
	"%4d %4d %3d %3d %4d %4d\n",
	llc->daddr.lsap, llc_conn_state_names[llc->state],
	llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag,
	llc->s_flag, llc->data_flag, llc->remote_busy_flag,
	llc->cause_flag, timer_pending(&llc->ack_timer.timer),
	timer_pending(&llc->pf_cycle_timer.timer),
	timer_pending(&llc->rej_sent_timer.timer),
	timer_pending(&llc->busy_state_timer.timer),
	!!sk->sk_backlog.tail, !!sk->sk_lock.owned);
	out:
	return 0;
	}

	static const struct seq_operations llc_seq_socket_ops = {
	.start = llc_seq_start,
	.next = llc_seq_next,
	.stop = llc_seq_stop,
	.show = llc_seq_socket_show,
	};

	static const struct seq_operations llc_seq_core_ops = {
	.start = llc_seq_start,
	.next = llc_seq_next,
	.stop = llc_seq_stop,
	.show = llc_seq_core_show,
	};

	static int llc_seq_socket_open(struct inode inode, struct file file)
	{
	return seq_open(file, &llc_seq_socket_ops);
	}

	static int llc_seq_core_open(struct inode inode, struct file file)
	{
	return seq_open(file, &llc_seq_core_ops);
	}

	static const struct file_operations llc_seq_socket_fops = {
	.open = llc_seq_socket_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release,
	};

	static const struct file_operations llc_seq_core_fops = {
	.open = llc_seq_core_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = seq_release,
	};

	static struct proc_dir_entry *llc_proc_dir;

	int __init llc_proc_init(void)
	{
	int rc = -ENOMEM;
	struct proc_dir_entry *p;

	llc_proc_dir = proc_mkdir("llc", init_net.proc_net);
	if (!llc_proc_dir)
	goto out;

	p = proc_create("socket", S_IRUGO, llc_proc_dir, &llc_seq_socket_fops);
	if (!p)
	goto out_socket;

	p = proc_create("core", S_IRUGO, llc_proc_dir, &llc_seq_core_fops);
	if (!p)
	goto out_core;

	rc = 0;
	out:
	return rc;
	out_core:
	remove_proc_entry("socket", llc_proc_dir);
	out_socket:
	remove_proc_entry("llc", init_net.proc_net);
	goto out;
	}

	void llc_proc_exit(void)
	{
	remove_proc_entry("socket", llc_proc_dir);
	remove_proc_entry("core", llc_proc_dir);
	remove_proc_entry("llc", init_net.proc_net);
	}