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251 lines
6.0 KiB
251 lines
6.0 KiB
/* |
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* proc_llc.c - proc interface for LLC |
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* |
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* Copyright (c) 2001 by Jay Schulist <[email protected]> |
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* 2002-2003 by Arnaldo Carvalho de Melo <[email protected]> |
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* |
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* This program can be redistributed or modified under the terms of the |
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* GNU General Public License as published by the Free Software Foundation. |
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* This program is distributed without any warranty or implied warranty |
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* of merchantability or fitness for a particular purpose. |
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* |
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* See the GNU General Public License for more details. |
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*/ |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/proc_fs.h> |
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#include <linux/errno.h> |
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#include <linux/seq_file.h> |
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#include <linux/export.h> |
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#include <net/net_namespace.h> |
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#include <net/sock.h> |
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#include <net/llc.h> |
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#include <net/llc_c_ac.h> |
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#include <net/llc_c_ev.h> |
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#include <net/llc_c_st.h> |
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#include <net/llc_conn.h> |
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static void llc_ui_format_mac(struct seq_file *seq, u8 *addr) |
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{ |
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seq_printf(seq, "%pM", addr); |
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} |
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static struct sock *llc_get_sk_idx(loff_t pos) |
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{ |
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struct llc_sap *sap; |
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struct sock *sk = NULL; |
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int i; |
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list_for_each_entry_rcu(sap, &llc_sap_list, node) { |
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spin_lock_bh(&sap->sk_lock); |
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for (i = 0; i < LLC_SK_LADDR_HASH_ENTRIES; i++) { |
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struct hlist_nulls_head *head = &sap->sk_laddr_hash[i]; |
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struct hlist_nulls_node *node; |
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sk_nulls_for_each(sk, node, head) { |
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if (!pos) |
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goto found; /* keep the lock */ |
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--pos; |
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} |
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} |
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spin_unlock_bh(&sap->sk_lock); |
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} |
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sk = NULL; |
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found: |
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return sk; |
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} |
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static void *llc_seq_start(struct seq_file *seq, loff_t *pos) __acquires(RCU) |
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{ |
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loff_t l = *pos; |
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rcu_read_lock_bh(); |
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return l ? llc_get_sk_idx(--l) : SEQ_START_TOKEN; |
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} |
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static struct sock *laddr_hash_next(struct llc_sap *sap, int bucket) |
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{ |
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struct hlist_nulls_node *node; |
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struct sock *sk = NULL; |
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while (++bucket < LLC_SK_LADDR_HASH_ENTRIES) |
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sk_nulls_for_each(sk, node, &sap->sk_laddr_hash[bucket]) |
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goto out; |
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out: |
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return sk; |
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} |
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static void *llc_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
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{ |
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struct sock* sk, *next; |
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struct llc_sock *llc; |
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struct llc_sap *sap; |
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++*pos; |
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if (v == SEQ_START_TOKEN) { |
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sk = llc_get_sk_idx(0); |
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goto out; |
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} |
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sk = v; |
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next = sk_nulls_next(sk); |
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if (next) { |
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sk = next; |
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goto out; |
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} |
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llc = llc_sk(sk); |
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sap = llc->sap; |
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sk = laddr_hash_next(sap, llc_sk_laddr_hashfn(sap, &llc->laddr)); |
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if (sk) |
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goto out; |
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spin_unlock_bh(&sap->sk_lock); |
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list_for_each_entry_continue_rcu(sap, &llc_sap_list, node) { |
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spin_lock_bh(&sap->sk_lock); |
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sk = laddr_hash_next(sap, -1); |
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if (sk) |
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break; /* keep the lock */ |
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spin_unlock_bh(&sap->sk_lock); |
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} |
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out: |
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return sk; |
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} |
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static void llc_seq_stop(struct seq_file *seq, void *v) |
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{ |
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if (v && v != SEQ_START_TOKEN) { |
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struct sock *sk = v; |
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struct llc_sock *llc = llc_sk(sk); |
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struct llc_sap *sap = llc->sap; |
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spin_unlock_bh(&sap->sk_lock); |
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} |
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rcu_read_unlock_bh(); |
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} |
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static int llc_seq_socket_show(struct seq_file *seq, void *v) |
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{ |
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struct sock* sk; |
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struct llc_sock *llc; |
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if (v == SEQ_START_TOKEN) { |
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seq_puts(seq, "SKt Mc local_mac_sap remote_mac_sap " |
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" tx_queue rx_queue st uid link\n"); |
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goto out; |
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} |
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sk = v; |
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llc = llc_sk(sk); |
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/* FIXME: check if the address is multicast */ |
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seq_printf(seq, "%2X %2X ", sk->sk_type, 0); |
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if (llc->dev) |
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llc_ui_format_mac(seq, llc->dev->dev_addr); |
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else { |
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u8 addr[6] = {0,0,0,0,0,0}; |
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llc_ui_format_mac(seq, addr); |
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} |
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seq_printf(seq, "@%02X ", llc->sap->laddr.lsap); |
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llc_ui_format_mac(seq, llc->daddr.mac); |
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seq_printf(seq, "@%02X %8d %8d %2d %3u %4d\n", llc->daddr.lsap, |
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sk_wmem_alloc_get(sk), |
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sk_rmem_alloc_get(sk) - llc->copied_seq, |
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sk->sk_state, |
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from_kuid_munged(seq_user_ns(seq), sock_i_uid(sk)), |
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llc->link); |
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out: |
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return 0; |
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} |
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static const char *const llc_conn_state_names[] = { |
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[LLC_CONN_STATE_ADM] = "adm", |
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[LLC_CONN_STATE_SETUP] = "setup", |
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[LLC_CONN_STATE_NORMAL] = "normal", |
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[LLC_CONN_STATE_BUSY] = "busy", |
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[LLC_CONN_STATE_REJ] = "rej", |
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[LLC_CONN_STATE_AWAIT] = "await", |
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[LLC_CONN_STATE_AWAIT_BUSY] = "await_busy", |
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[LLC_CONN_STATE_AWAIT_REJ] = "await_rej", |
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[LLC_CONN_STATE_D_CONN] = "d_conn", |
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[LLC_CONN_STATE_RESET] = "reset", |
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[LLC_CONN_STATE_ERROR] = "error", |
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[LLC_CONN_STATE_TEMP] = "temp", |
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}; |
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static int llc_seq_core_show(struct seq_file *seq, void *v) |
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{ |
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struct sock* sk; |
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struct llc_sock *llc; |
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if (v == SEQ_START_TOKEN) { |
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seq_puts(seq, "Connection list:\n" |
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"dsap state retr txw rxw pf ff sf df rs cs " |
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"tack tpfc trs tbs blog busr\n"); |
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goto out; |
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} |
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sk = v; |
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llc = llc_sk(sk); |
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seq_printf(seq, " %02X %-10s %3d %3d %3d %2d %2d %2d %2d %2d %2d " |
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"%4d %4d %3d %3d %4d %4d\n", |
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llc->daddr.lsap, llc_conn_state_names[llc->state], |
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llc->retry_count, llc->k, llc->rw, llc->p_flag, llc->f_flag, |
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llc->s_flag, llc->data_flag, llc->remote_busy_flag, |
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llc->cause_flag, timer_pending(&llc->ack_timer.timer), |
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timer_pending(&llc->pf_cycle_timer.timer), |
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timer_pending(&llc->rej_sent_timer.timer), |
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timer_pending(&llc->busy_state_timer.timer), |
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!!sk->sk_backlog.tail, !!sk->sk_lock.owned); |
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out: |
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return 0; |
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} |
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static const struct seq_operations llc_seq_socket_ops = { |
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.start = llc_seq_start, |
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.next = llc_seq_next, |
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.stop = llc_seq_stop, |
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.show = llc_seq_socket_show, |
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}; |
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static const struct seq_operations llc_seq_core_ops = { |
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.start = llc_seq_start, |
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.next = llc_seq_next, |
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.stop = llc_seq_stop, |
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.show = llc_seq_core_show, |
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}; |
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static struct proc_dir_entry *llc_proc_dir; |
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int __init llc_proc_init(void) |
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{ |
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int rc = -ENOMEM; |
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struct proc_dir_entry *p; |
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llc_proc_dir = proc_mkdir("llc", init_net.proc_net); |
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if (!llc_proc_dir) |
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goto out; |
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p = proc_create_seq("socket", 0444, llc_proc_dir, &llc_seq_socket_ops); |
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if (!p) |
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goto out_socket; |
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p = proc_create_seq("core", 0444, llc_proc_dir, &llc_seq_core_ops); |
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if (!p) |
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goto out_core; |
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rc = 0; |
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out: |
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return rc; |
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out_core: |
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remove_proc_entry("socket", llc_proc_dir); |
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out_socket: |
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remove_proc_entry("llc", init_net.proc_net); |
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goto out; |
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} |
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void llc_proc_exit(void) |
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{ |
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remove_proc_entry("socket", llc_proc_dir); |
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remove_proc_entry("core", llc_proc_dir); |
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remove_proc_entry("llc", init_net.proc_net); |
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}
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