forked from Minki/linux
net: dccp: Remove dccpprobe module
Remove DCCP probe module since jprobe has been deprecated. That function is now replaced by dccp/dccp_probe trace-event. You can use it via ftrace or perftools. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Masami Hiramatsu
David S. Miller
parent
ee549be6f0
commit
a56c1470c2
@ -39,23 +39,6 @@ config IP_DCCP_DEBUG
|
||||
|
||||
Just say N.
|
||||
|
||||
config NET_DCCPPROBE
|
||||
tristate "DCCP connection probing"
|
||||
depends on PROC_FS && KPROBES
|
||||
---help---
|
||||
This module allows for capturing the changes to DCCP connection
|
||||
state in response to incoming packets. It is used for debugging
|
||||
DCCP congestion avoidance modules. If you don't understand
|
||||
what was just said, you don't need it: say N.
|
||||
|
||||
Documentation on how to use DCCP connection probing can be found
|
||||
at:
|
||||
|
||||
http://www.linuxfoundation.org/collaborate/workgroups/networking/dccpprobe
|
||||
|
||||
To compile this code as a module, choose M here: the
|
||||
module will be called dccp_probe.
|
||||
|
||||
|
||||
endmenu
|
||||
|
||||
|
||||
@ -21,12 +21,10 @@ obj-$(subst y,$(CONFIG_IP_DCCP),$(CONFIG_IPV6)) += dccp_ipv6.o
|
||||
dccp_ipv6-y := ipv6.o
|
||||
|
||||
obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
|
||||
obj-$(CONFIG_NET_DCCPPROBE) += dccp_probe.o
|
||||
|
||||
dccp-$(CONFIG_SYSCTL) += sysctl.o
|
||||
|
||||
dccp_diag-y := diag.o
|
||||
dccp_probe-y := probe.o
|
||||
|
||||
# build with local directory for trace.h
|
||||
CFLAGS_proto.o := -I$(src)
|
||||
|
||||
203
net/dccp/probe.c
203
net/dccp/probe.c
@ -1,203 +0,0 @@
|
||||
/*
|
||||
* dccp_probe - Observe the DCCP flow with kprobes.
|
||||
*
|
||||
* The idea for this came from Werner Almesberger's umlsim
|
||||
* Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
|
||||
*
|
||||
* Modified for DCCP from Stephen Hemminger's code
|
||||
* Copyright (C) 2006, Ian McDonald <ian.mcdonald@jandi.co.nz>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kprobes.h>
|
||||
#include <linux/socket.h>
|
||||
#include <linux/dccp.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/kfifo.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/time64.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <net/net_namespace.h>
|
||||
|
||||
#include "dccp.h"
|
||||
#include "ccid.h"
|
||||
#include "ccids/ccid3.h"
|
||||
|
||||
static int port;
|
||||
|
||||
static int bufsize = 64 * 1024;
|
||||
|
||||
static const char procname[] = "dccpprobe";
|
||||
|
||||
static struct {
|
||||
struct kfifo fifo;
|
||||
spinlock_t lock;
|
||||
wait_queue_head_t wait;
|
||||
struct timespec64 tstart;
|
||||
} dccpw;
|
||||
|
||||
static void printl(const char *fmt, ...)
|
||||
{
|
||||
va_list args;
|
||||
int len;
|
||||
struct timespec64 now;
|
||||
char tbuf[256];
|
||||
|
||||
va_start(args, fmt);
|
||||
getnstimeofday64(&now);
|
||||
|
||||
now = timespec64_sub(now, dccpw.tstart);
|
||||
|
||||
len = sprintf(tbuf, "%lu.%06lu ",
|
||||
(unsigned long) now.tv_sec,
|
||||
(unsigned long) now.tv_nsec / NSEC_PER_USEC);
|
||||
len += vscnprintf(tbuf+len, sizeof(tbuf)-len, fmt, args);
|
||||
va_end(args);
|
||||
|
||||
kfifo_in_locked(&dccpw.fifo, tbuf, len, &dccpw.lock);
|
||||
wake_up(&dccpw.wait);
|
||||
}
|
||||
|
||||
static int jdccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
|
||||
{
|
||||
const struct inet_sock *inet = inet_sk(sk);
|
||||
struct ccid3_hc_tx_sock *hc = NULL;
|
||||
|
||||
if (ccid_get_current_tx_ccid(dccp_sk(sk)) == DCCPC_CCID3)
|
||||
hc = ccid3_hc_tx_sk(sk);
|
||||
|
||||
if (port == 0 || ntohs(inet->inet_dport) == port ||
|
||||
ntohs(inet->inet_sport) == port) {
|
||||
if (hc)
|
||||
printl("%pI4:%u %pI4:%u %d %d %d %d %u %llu %llu %d\n",
|
||||
&inet->inet_saddr, ntohs(inet->inet_sport),
|
||||
&inet->inet_daddr, ntohs(inet->inet_dport), size,
|
||||
hc->tx_s, hc->tx_rtt, hc->tx_p,
|
||||
hc->tx_x_calc, hc->tx_x_recv >> 6,
|
||||
hc->tx_x >> 6, hc->tx_t_ipi);
|
||||
else
|
||||
printl("%pI4:%u %pI4:%u %d\n",
|
||||
&inet->inet_saddr, ntohs(inet->inet_sport),
|
||||
&inet->inet_daddr, ntohs(inet->inet_dport),
|
||||
size);
|
||||
}
|
||||
|
||||
jprobe_return();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct jprobe dccp_send_probe = {
|
||||
.kp = {
|
||||
.symbol_name = "dccp_sendmsg",
|
||||
},
|
||||
.entry = jdccp_sendmsg,
|
||||
};
|
||||
|
||||
static int dccpprobe_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
kfifo_reset(&dccpw.fifo);
|
||||
getnstimeofday64(&dccpw.tstart);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t dccpprobe_read(struct file *file, char __user *buf,
|
||||
size_t len, loff_t *ppos)
|
||||
{
|
||||
int error = 0, cnt = 0;
|
||||
unsigned char *tbuf;
|
||||
|
||||
if (!buf)
|
||||
return -EINVAL;
|
||||
|
||||
if (len == 0)
|
||||
return 0;
|
||||
|
||||
tbuf = vmalloc(len);
|
||||
if (!tbuf)
|
||||
return -ENOMEM;
|
||||
|
||||
error = wait_event_interruptible(dccpw.wait,
|
||||
kfifo_len(&dccpw.fifo) != 0);
|
||||
if (error)
|
||||
goto out_free;
|
||||
|
||||
cnt = kfifo_out_locked(&dccpw.fifo, tbuf, len, &dccpw.lock);
|
||||
error = copy_to_user(buf, tbuf, cnt) ? -EFAULT : 0;
|
||||
|
||||
out_free:
|
||||
vfree(tbuf);
|
||||
|
||||
return error ? error : cnt;
|
||||
}
|
||||
|
||||
static const struct file_operations dccpprobe_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = dccpprobe_open,
|
||||
.read = dccpprobe_read,
|
||||
.llseek = noop_llseek,
|
||||
};
|
||||
|
||||
static __init int dccpprobe_init(void)
|
||||
{
|
||||
int ret = -ENOMEM;
|
||||
|
||||
init_waitqueue_head(&dccpw.wait);
|
||||
spin_lock_init(&dccpw.lock);
|
||||
if (kfifo_alloc(&dccpw.fifo, bufsize, GFP_KERNEL))
|
||||
return ret;
|
||||
if (!proc_create(procname, S_IRUSR, init_net.proc_net, &dccpprobe_fops))
|
||||
goto err0;
|
||||
|
||||
ret = register_jprobe(&dccp_send_probe);
|
||||
if (ret) {
|
||||
ret = request_module("dccp");
|
||||
if (!ret)
|
||||
ret = register_jprobe(&dccp_send_probe);
|
||||
}
|
||||
|
||||
if (ret)
|
||||
goto err1;
|
||||
|
||||
pr_info("DCCP watch registered (port=%d)\n", port);
|
||||
return 0;
|
||||
err1:
|
||||
remove_proc_entry(procname, init_net.proc_net);
|
||||
err0:
|
||||
kfifo_free(&dccpw.fifo);
|
||||
return ret;
|
||||
}
|
||||
module_init(dccpprobe_init);
|
||||
|
||||
static __exit void dccpprobe_exit(void)
|
||||
{
|
||||
kfifo_free(&dccpw.fifo);
|
||||
remove_proc_entry(procname, init_net.proc_net);
|
||||
unregister_jprobe(&dccp_send_probe);
|
||||
|
||||
}
|
||||
module_exit(dccpprobe_exit);
|
||||
|
||||
MODULE_PARM_DESC(port, "Port to match (0=all)");
|
||||
module_param(port, int, 0);
|
||||
|
||||
MODULE_PARM_DESC(bufsize, "Log buffer size (default 64k)");
|
||||
module_param(bufsize, int, 0);
|
||||
|
||||
MODULE_AUTHOR("Ian McDonald <ian.mcdonald@jandi.co.nz>");
|
||||
MODULE_DESCRIPTION("DCCP snooper");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user