/* * 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 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_seq("socket", 0444, llc_proc_dir, &llc_seq_socket_ops); if (!p) goto out_socket; p = proc_create_seq("core", 0444, llc_proc_dir, &llc_seq_core_ops); 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); }