1 files changed, 617 insertions, 0 deletions

diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
new file mode 100644
index 000000000000..3b5ecd8e2401
--- /dev/null
+++ b/net/rxrpc/proc.c
@@ -0,0 +1,617 @@
+/* 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() */