// SPDX-License-Identifier: GPL-2.0-only /* * atalk_proc.c - proc support for Appletalk * * Copyright(c) Arnaldo Carvalho de Melo <acme@conectiva.com.br> */ #include <linux/init.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <net/net_namespace.h> #include <net/sock.h> #include <linux/atalk.h> #include <linux/export.h> static __inline__ struct atalk_iface *atalk_get_interface_idx(loff_t pos) { struct atalk_iface *i; for (i = atalk_interfaces; pos && i; i = i->next) --pos; return i; } static void *atalk_seq_interface_start(struct seq_file *seq, loff_t *pos) __acquires(atalk_interfaces_lock) { loff_t l = *pos; read_lock_bh(&atalk_interfaces_lock); return l ? atalk_get_interface_idx(--l) : SEQ_START_TOKEN; } static void *atalk_seq_interface_next(struct seq_file *seq, void *v, loff_t *pos) { struct atalk_iface *i; ++*pos; if (v == SEQ_START_TOKEN) { i = NULL; if (atalk_interfaces) i = atalk_interfaces; goto out; } i = v; i = i->next; out: return i; } static void atalk_seq_interface_stop(struct seq_file *seq, void *v) __releases(atalk_interfaces_lock) { read_unlock_bh(&atalk_interfaces_lock); } static int atalk_seq_interface_show(struct seq_file *seq, void *v) { struct atalk_iface *iface; if (v == SEQ_START_TOKEN) { seq_puts(seq, "Interface Address Networks " "Status\n"); goto out; } iface = v; seq_printf(seq, "%-16s %04X:%02X %04X-%04X %d\n", iface->dev->name, ntohs(iface->address.s_net), iface->address.s_node, ntohs(iface->nets.nr_firstnet), ntohs(iface->nets.nr_lastnet), iface->status); out: return 0; } static __inline__ struct atalk_route *atalk_get_route_idx(loff_t pos) { struct atalk_route *r; for (r = atalk_routes; pos && r; r = r->next) --pos; return r; } static void *atalk_seq_route_start(struct seq_file *seq, loff_t *pos) __acquires(atalk_routes_lock) { loff_t l = *pos; read_lock_bh(&atalk_routes_lock); return l ? atalk_get_route_idx(--l) : SEQ_START_TOKEN; } static void *atalk_seq_route_next(struct seq_file *seq, void *v, loff_t *pos) { struct atalk_route *r; ++*pos; if (v == SEQ_START_TOKEN) { r = NULL; if (atalk_routes) r = atalk_routes; goto out; } r = v; r = r->next; out: return r; } static void atalk_seq_route_stop(struct seq_file *seq, void *v) __releases(atalk_routes_lock) { read_unlock_bh(&atalk_routes_lock); } static int atalk_seq_route_show(struct seq_file *seq, void *v) { struct atalk_route *rt; if (v == SEQ_START_TOKEN) { seq_puts(seq, "Target Router Flags Dev\n"); goto out; } if (atrtr_default.dev) { rt = &atrtr_default; seq_printf(seq, "Default %04X:%02X %-4d %s\n", ntohs(rt->gateway.s_net), rt->gateway.s_node, rt->flags, rt->dev->name); } rt = v; seq_printf(seq, "%04X:%02X %04X:%02X %-4d %s\n", ntohs(rt->target.s_net), rt->target.s_node, ntohs(rt->gateway.s_net), rt->gateway.s_node, rt->flags, rt->dev->name); out: return 0; } static void *atalk_seq_socket_start(struct seq_file *seq, loff_t *pos) __acquires(atalk_sockets_lock) { read_lock_bh(&atalk_sockets_lock); return seq_hlist_start_head(&atalk_sockets, *pos); } static void *atalk_seq_socket_next(struct seq_file *seq, void *v, loff_t *pos) { return seq_hlist_next(v, &atalk_sockets, pos); } static void atalk_seq_socket_stop(struct seq_file *seq, void *v) __releases(atalk_sockets_lock) { read_unlock_bh(&atalk_sockets_lock); } static int atalk_seq_socket_show(struct seq_file *seq, void *v) { struct sock *s; struct atalk_sock *at; if (v == SEQ_START_TOKEN) { seq_printf(seq, "Type Local_addr Remote_addr Tx_queue " "Rx_queue St UID\n"); goto out; } s = sk_entry(v); at = at_sk(s); seq_printf(seq, "%02X %04X:%02X:%02X %04X:%02X:%02X %08X:%08X " "%02X %u\n", s->sk_type, ntohs(at->src_net), at->src_node, at->src_port, ntohs(at->dest_net), at->dest_node, at->dest_port, sk_wmem_alloc_get(s), sk_rmem_alloc_get(s), s->sk_state, from_kuid_munged(seq_user_ns(seq), sock_i_uid(s))); out: return 0; } static const struct seq_operations atalk_seq_interface_ops = { .start = atalk_seq_interface_start, .next = atalk_seq_interface_next, .stop = atalk_seq_interface_stop, .show = atalk_seq_interface_show, }; static const struct seq_operations atalk_seq_route_ops = { .start = atalk_seq_route_start, .next = atalk_seq_route_next, .stop = atalk_seq_route_stop, .show = atalk_seq_route_show, }; static const struct seq_operations atalk_seq_socket_ops = { .start = atalk_seq_socket_start, .next = atalk_seq_socket_next, .stop = atalk_seq_socket_stop, .show = atalk_seq_socket_show, }; int __init atalk_proc_init(void) { if (!proc_mkdir("atalk", init_net.proc_net)) return -ENOMEM; if (!proc_create_seq("atalk/interface", 0444, init_net.proc_net, &atalk_seq_interface_ops)) goto out; if (!proc_create_seq("atalk/route", 0444, init_net.proc_net, &atalk_seq_route_ops)) goto out; if (!proc_create_seq("atalk/socket", 0444, init_net.proc_net, &atalk_seq_socket_ops)) goto out; if (!proc_create_seq_private("atalk/arp", 0444, init_net.proc_net, &aarp_seq_ops, sizeof(struct aarp_iter_state), NULL)) goto out; return 0; out: remove_proc_subtree("atalk", init_net.proc_net); return -ENOMEM; } void atalk_proc_exit(void) { remove_proc_subtree("atalk", init_net.proc_net); }