diff options
Diffstat (limited to 'net/llc/llc_proc.c')
| -rw-r--r-- | net/llc/llc_proc.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/net/llc/llc_proc.c b/net/llc/llc_proc.c new file mode 100644 index 0000000000..07e9abb597 --- /dev/null +++ b/net/llc/llc_proc.c @@ -0,0 +1,251 @@ +/* + * 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, const 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) __acquires(RCU) +{ + 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_nocheck(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 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); +} |