--- /dev/null
+/*
+ * 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, !!sock_owned_by_user(sk));
+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 = {
+ .owner = THIS_MODULE,
+ .open = llc_seq_socket_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static const struct file_operations llc_seq_core_fops = {
+ .owner = THIS_MODULE,
+ .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);
+}
Code Review / kvmfornfv.git / blobdiff