/* * 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 <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) { DECLARE_MAC_BUF(mac); seq_printf(seq, "%s", print_mac(mac, addr)); } static struct sock *llc_get_sk_idx(loff_t pos) { struct list_head *sap_entry; struct llc_sap *sap; struct hlist_node *node; struct sock *sk = NULL; list_for_each(sap_entry, &llc_sap_list) { sap = list_entry(sap_entry, struct llc_sap, node); read_lock_bh(&sap->sk_list.lock); sk_for_each(sk, node, &sap->sk_list.list) { if (!pos) goto found; --pos; } read_unlock_bh(&sap->sk_list.lock); } sk = NULL; found: return sk; } static void *llc_seq_start(struct seq_file *seq, loff_t *pos) { loff_t l = *pos; read_lock_bh(&llc_sap_list_lock); return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN; } 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_next(sk); if (next) { sk = next; goto out; } llc = llc_sk(sk); sap = llc->sap; read_unlock_bh(&sap->sk_list.lock); sk = NULL; for (;;) { if (sap->node.next == &llc_sap_list) break; sap = list_entry(sap->node.next, struct llc_sap, node); read_lock_bh(&sap->sk_list.lock); if (!hlist_empty(&sap->sk_list.list)) { sk = sk_head(&sap->sk_list.list); break; } read_unlock_bh(&sap->sk_list.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; read_unlock_bh(&sap->sk_list.lock); } read_unlock_bh(&llc_sap_list_lock); } 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 %3d %4d\n", llc->daddr.lsap, atomic_read(&sk->sk_wmem_alloc), atomic_read(&sk->sk_rmem_alloc) - llc->copied_seq, sk->sk_state, sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : -1, llc->link); out: return 0; } static char *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; llc_proc_dir->owner = THIS_MODULE; p = create_proc_entry("socket", S_IRUGO, llc_proc_dir); if (!p) goto out_socket; p->proc_fops = &llc_seq_socket_fops; p = create_proc_entry("core", S_IRUGO, llc_proc_dir); if (!p) goto out_core; p->proc_fops = &llc_seq_core_fops; 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); }