/* proc.c: /proc interface for RxRPC * * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/sched.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <rxrpc/rxrpc.h> #include <rxrpc/transport.h> #include <rxrpc/peer.h> #include <rxrpc/connection.h> #include <rxrpc/call.h> #include <rxrpc/message.h> #include "internal.h" static struct proc_dir_entry *proc_rxrpc; static int rxrpc_proc_transports_open(struct inode *inode, struct file *file); static void *rxrpc_proc_transports_start(struct seq_file *p, loff_t *pos); static void *rxrpc_proc_transports_next(struct seq_file *p, void *v, loff_t *pos); static void rxrpc_proc_transports_stop(struct seq_file *p, void *v); static int rxrpc_proc_transports_show(struct seq_file *m, void *v); static struct seq_operations rxrpc_proc_transports_ops = { .start = rxrpc_proc_transports_start, .next = rxrpc_proc_transports_next, .stop = rxrpc_proc_transports_stop, .show = rxrpc_proc_transports_show, }; static struct file_operations rxrpc_proc_transports_fops = { .open = rxrpc_proc_transports_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static int rxrpc_proc_peers_open(struct inode *inode, struct file *file); static void *rxrpc_proc_peers_start(struct seq_file *p, loff_t *pos); static void *rxrpc_proc_peers_next(struct seq_file *p, void *v, loff_t *pos); static void rxrpc_proc_peers_stop(struct seq_file *p, void *v); static int rxrpc_proc_peers_show(struct seq_file *m, void *v); static struct seq_operations rxrpc_proc_peers_ops = { .start = rxrpc_proc_peers_start, .next = rxrpc_proc_peers_next, .stop = rxrpc_proc_peers_stop, .show = rxrpc_proc_peers_show, }; static struct file_operations rxrpc_proc_peers_fops = { .open = rxrpc_proc_peers_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static int rxrpc_proc_conns_open(struct inode *inode, struct file *file); static void *rxrpc_proc_conns_start(struct seq_file *p, loff_t *pos); static void *rxrpc_proc_conns_next(struct seq_file *p, void *v, loff_t *pos); static void rxrpc_proc_conns_stop(struct seq_file *p, void *v); static int rxrpc_proc_conns_show(struct seq_file *m, void *v); static struct seq_operations rxrpc_proc_conns_ops = { .start = rxrpc_proc_conns_start, .next = rxrpc_proc_conns_next, .stop = rxrpc_proc_conns_stop, .show = rxrpc_proc_conns_show, }; static struct file_operations rxrpc_proc_conns_fops = { .open = rxrpc_proc_conns_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static int rxrpc_proc_calls_open(struct inode *inode, struct file *file); static void *rxrpc_proc_calls_start(struct seq_file *p, loff_t *pos); static void *rxrpc_proc_calls_next(struct seq_file *p, void *v, loff_t *pos); static void rxrpc_proc_calls_stop(struct seq_file *p, void *v); static int rxrpc_proc_calls_show(struct seq_file *m, void *v); static struct seq_operations rxrpc_proc_calls_ops = { .start = rxrpc_proc_calls_start, .next = rxrpc_proc_calls_next, .stop = rxrpc_proc_calls_stop, .show = rxrpc_proc_calls_show, }; static struct file_operations rxrpc_proc_calls_fops = { .open = rxrpc_proc_calls_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static const char *rxrpc_call_states7[] = { "complet", "error ", "rcv_op ", "rcv_arg", "got_arg", "snd_rpl", "fin_ack", "snd_arg", "rcv_rpl", "got_rpl" }; static const char *rxrpc_call_error_states7[] = { "no_err ", "loc_abt", "rmt_abt", "loc_err", "rmt_err" }; /*****************************************************************************/ /* * initialise the /proc/net/rxrpc/ directory */ int rxrpc_proc_init(void) { struct proc_dir_entry *p; proc_rxrpc = proc_mkdir("rxrpc", proc_net); if (!proc_rxrpc) goto error; proc_rxrpc->owner = THIS_MODULE; p = create_proc_entry("calls", 0, proc_rxrpc); if (!p) goto error_proc; p->proc_fops = &rxrpc_proc_calls_fops; p->owner = THIS_MODULE; p = create_proc_entry("connections", 0, proc_rxrpc); if (!p) goto error_calls; p->proc_fops = &rxrpc_proc_conns_fops; p->owner = THIS_MODULE; p = create_proc_entry("peers", 0, proc_rxrpc); if (!p) goto error_calls; p->proc_fops = &rxrpc_proc_peers_fops; p->owner = THIS_MODULE; p = create_proc_entry("transports", 0, proc_rxrpc); if (!p) goto error_conns; p->proc_fops = &rxrpc_proc_transports_fops; p->owner = THIS_MODULE; return 0; error_conns: remove_proc_entry("connections", proc_rxrpc); error_calls: remove_proc_entry("calls", proc_rxrpc); error_proc: remove_proc_entry("rxrpc", proc_net); error: return -ENOMEM; } /* end rxrpc_proc_init() */ /*****************************************************************************/ /* * clean up the /proc/net/rxrpc/ directory */ void rxrpc_proc_cleanup(void) { remove_proc_entry("transports", proc_rxrpc); remove_proc_entry("peers", proc_rxrpc); remove_proc_entry("connections", proc_rxrpc); remove_proc_entry("calls", proc_rxrpc); remove_proc_entry("rxrpc", proc_net); } /* end rxrpc_proc_cleanup() */ /*****************************************************************************/ /* * open "/proc/net/rxrpc/transports" which provides a summary of extant transports */ static int rxrpc_proc_transports_open(struct inode *inode, struct file *file) { struct seq_file *m; int ret; ret = seq_open(file, &rxrpc_proc_transports_ops); if (ret < 0) return ret; m = file->private_data; m->private = PDE(inode)->data; return 0; } /* end rxrpc_proc_transports_open() */ /*****************************************************************************/ /* * set up the iterator to start reading from the transports list and return the first item */ static void *rxrpc_proc_transports_start(struct seq_file *m, loff_t *_pos) { struct list_head *_p; loff_t pos = *_pos; /* lock the list against modification */ down_read(&rxrpc_proc_transports_sem); /* allow for the header line */ if (!pos) return SEQ_START_TOKEN; pos--; /* find the n'th element in the list */ list_for_each(_p, &rxrpc_proc_transports) if (!pos--) break; return _p != &rxrpc_proc_transports ? _p : NULL; } /* end rxrpc_proc_transports_start() */ /*****************************************************************************/ /* * move to next call in transports list */ static void *rxrpc_proc_transports_next(struct seq_file *p, void *v, loff_t *pos) { struct list_head *_p; (*pos)++; _p = v; _p = (v == SEQ_START_TOKEN) ? rxrpc_proc_transports.next : _p->next; return _p != &rxrpc_proc_transports ? _p : NULL; } /* end rxrpc_proc_transports_next() */ /*****************************************************************************/ /* * clean up after reading from the transports list */ static void rxrpc_proc_transports_stop(struct seq_file *p, void *v) { up_read(&rxrpc_proc_transports_sem); } /* end rxrpc_proc_transports_stop() */ /*****************************************************************************/ /* * display a header line followed by a load of call lines */ static int rxrpc_proc_transports_show(struct seq_file *m, void *v) { struct rxrpc_transport *trans = list_entry(v, struct rxrpc_transport, proc_link); /* display header on line 1 */ if (v == SEQ_START_TOKEN) { seq_puts(m, "LOCAL USE\n"); return 0; } /* display one transport per line on subsequent lines */ seq_printf(m, "%5hu %3d\n", trans->port, atomic_read(&trans->usage) ); return 0; } /* end rxrpc_proc_transports_show() */ /*****************************************************************************/ /* * open "/proc/net/rxrpc/peers" which provides a summary of extant peers */ static int rxrpc_proc_peers_open(struct inode *inode, struct file *file) { struct seq_file *m; int ret; ret = seq_open(file, &rxrpc_proc_peers_ops); if (ret < 0) return ret; m = file->private_data; m->private = PDE(inode)->data; return 0; } /* end rxrpc_proc_peers_open() */ /*****************************************************************************/ /* * set up the iterator to start reading from the peers list and return the * first item */ static void *rxrpc_proc_peers_start(struct seq_file *m, loff_t *_pos) { struct list_head *_p; loff_t pos = *_pos; /* lock the list against modification */ down_read(&rxrpc_peers_sem); /* allow for the header line */ if (!pos) return SEQ_START_TOKEN; pos--; /* find the n'th element in the list */ list_for_each(_p, &rxrpc_peers) if (!pos--) break; return _p != &rxrpc_peers ? _p : NULL; } /* end rxrpc_proc_peers_start() */ /*****************************************************************************/ /* * move to next conn in peers list */ static void *rxrpc_proc_peers_next(struct seq_file *p, void *v, loff_t *pos) { struct list_head *_p; (*pos)++; _p = v; _p = (v == SEQ_START_TOKEN) ? rxrpc_peers.next : _p->next; return _p != &rxrpc_peers ? _p : NULL; } /* end rxrpc_proc_peers_next() */ /*****************************************************************************/ /* * clean up after reading from the peers list */ static void rxrpc_proc_peers_stop(struct seq_file *p, void *v) { up_read(&rxrpc_peers_sem); } /* end rxrpc_proc_peers_stop() */ /*****************************************************************************/ /* * display a header line followed by a load of conn lines */ static int rxrpc_proc_peers_show(struct seq_file *m, void *v) { struct rxrpc_peer *peer = list_entry(v, struct rxrpc_peer, proc_link); signed long timeout; /* display header on line 1 */ if (v == SEQ_START_TOKEN) { seq_puts(m, "LOCAL REMOTE USAGE CONNS TIMEOUT" " MTU RTT(uS)\n"); return 0; } /* display one peer per line on subsequent lines */ timeout = 0; if (!list_empty(&peer->timeout.link)) timeout = (signed long) peer->timeout.timo_jif - (signed long) jiffies; seq_printf(m, "%5hu %08x %5d %5d %8ld %5Zu %7lu\n", peer->trans->port, ntohl(peer->addr.s_addr), atomic_read(&peer->usage), atomic_read(&peer->conn_count), timeout, peer->if_mtu, (long) peer->rtt ); return 0; } /* end rxrpc_proc_peers_show() */ /*****************************************************************************/ /* * open "/proc/net/rxrpc/connections" which provides a summary of extant * connections */ static int rxrpc_proc_conns_open(struct inode *inode, struct file *file) { struct seq_file *m; int ret; ret = seq_open(file, &rxrpc_proc_conns_ops); if (ret < 0) return ret; m = file->private_data; m->private = PDE(inode)->data; return 0; } /* end rxrpc_proc_conns_open() */ /*****************************************************************************/ /* * set up the iterator to start reading from the conns list and return the * first item */ static void *rxrpc_proc_conns_start(struct seq_file *m, loff_t *_pos) { struct list_head *_p; loff_t pos = *_pos; /* lock the list against modification */ down_read(&rxrpc_conns_sem); /* allow for the header line */ if (!pos) return SEQ_START_TOKEN; pos--; /* find the n'th element in the list */ list_for_each(_p, &rxrpc_conns) if (!pos--) break; return _p != &rxrpc_conns ? _p : NULL; } /* end rxrpc_proc_conns_start() */ /*****************************************************************************/ /* * move to next conn in conns list */ static void *rxrpc_proc_conns_next(struct seq_file *p, void *v, loff_t *pos) { struct list_head *_p; (*pos)++; _p = v; _p = (v == SEQ_START_TOKEN) ? rxrpc_conns.next : _p->next; return _p != &rxrpc_conns ? _p : NULL; } /* end rxrpc_proc_conns_next() */ /*****************************************************************************/ /* * clean up after reading from the conns list */ static void rxrpc_proc_conns_stop(struct seq_file *p, void *v) { up_read(&rxrpc_conns_sem); } /* end rxrpc_proc_conns_stop() */ /*****************************************************************************/ /* * display a header line followed by a load of conn lines */ static int rxrpc_proc_conns_show(struct seq_file *m, void *v) { struct rxrpc_connection *conn; signed long timeout; conn = list_entry(v, struct rxrpc_connection, proc_link); /* display header on line 1 */ if (v == SEQ_START_TOKEN) { seq_puts(m, "LOCAL REMOTE RPORT SRVC CONN END SERIALNO " "CALLNO MTU TIMEOUT" "\n"); return 0; } /* display one conn per line on subsequent lines */ timeout = 0; if (!list_empty(&conn->timeout.link)) timeout = (signed long) conn->timeout.timo_jif - (signed long) jiffies; seq_printf(m, "%5hu %08x %5hu %04hx %08x %-3.3s %08x %08x %5Zu %8ld\n", conn->trans->port, ntohl(conn->addr.sin_addr.s_addr), ntohs(conn->addr.sin_port), ntohs(conn->service_id), ntohl(conn->conn_id), conn->out_clientflag ? "CLT" : "SRV", conn->serial_counter, conn->call_counter, conn->mtu_size, timeout ); return 0; } /* end rxrpc_proc_conns_show() */ /*****************************************************************************/ /* * open "/proc/net/rxrpc/calls" which provides a summary of extant calls */ static int rxrpc_proc_calls_open(struct inode *inode, struct file *file) { struct seq_file *m; int ret; ret = seq_open(file, &rxrpc_proc_calls_ops); if (ret < 0) return ret; m = file->private_data; m->private = PDE(inode)->data; return 0; } /* end rxrpc_proc_calls_open() */ /*****************************************************************************/ /* * set up the iterator to start reading from the calls list and return the * first item */ static void *rxrpc_proc_calls_start(struct seq_file *m, loff_t *_pos) { struct list_head *_p; loff_t pos = *_pos; /* lock the list against modification */ down_read(&rxrpc_calls_sem); /* allow for the header line */ if (!pos) return SEQ_START_TOKEN; pos--; /* find the n'th element in the list */ list_for_each(_p, &rxrpc_calls) if (!pos--) break; return _p != &rxrpc_calls ? _p : NULL; } /* end rxrpc_proc_calls_start() */ /*****************************************************************************/ /* * move to next call in calls list */ static void *rxrpc_proc_calls_next(struct seq_file *p, void *v, loff_t *pos) { struct list_head *_p; (*pos)++; _p = v; _p = (v == SEQ_START_TOKEN) ? rxrpc_calls.next : _p->next; return _p != &rxrpc_calls ? _p : NULL; } /* end rxrpc_proc_calls_next() */ /*****************************************************************************/ /* * clean up after reading from the calls list */ static void rxrpc_proc_calls_stop(struct seq_file *p, void *v) { up_read(&rxrpc_calls_sem); } /* end rxrpc_proc_calls_stop() */ /*****************************************************************************/ /* * display a header line followed by a load of call lines */ static int rxrpc_proc_calls_show(struct seq_file *m, void *v) { struct rxrpc_call *call = list_entry(v, struct rxrpc_call, call_link); /* display header on line 1 */ if (v == SEQ_START_TOKEN) { seq_puts(m, "LOCAL REMOT SRVC CONN CALL DIR USE " " L STATE OPCODE ABORT ERRNO\n" ); return 0; } /* display one call per line on subsequent lines */ seq_printf(m, "%5hu %5hu %04hx %08x %08x %s %3u%c" " %c %-7.7s %6d %08x %5d\n", call->conn->trans->port, ntohs(call->conn->addr.sin_port), ntohs(call->conn->service_id), ntohl(call->conn->conn_id), ntohl(call->call_id), call->conn->service ? "SVC" : "CLT", atomic_read(&call->usage), waitqueue_active(&call->waitq) ? 'w' : ' ', call->app_last_rcv ? 'Y' : '-', (call->app_call_state!=RXRPC_CSTATE_ERROR ? rxrpc_call_states7[call->app_call_state] : rxrpc_call_error_states7[call->app_err_state]), call->app_opcode, call->app_abort_code, call->app_errno ); return 0; } /* end rxrpc_proc_calls_show() */