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>

diff --git a/net/dccp/Kconfig b/net/dccp/Kconfig
index 8c0ef71bed2f6a17169e06fd0175d576c03a7403..b270e84d9c130fbe0f38f5d36049a9915fc3ae65 100644 (file)
--- a/net/dccp/Kconfig
+++ b/net/dccp/Kconfig
@@ -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
 

diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index 4215f13a63af599f91123c5dc21122bc7d807152..5b4ff37bc80619d3d4be7191d58a1753755ac2e9 100644 (file)
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -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)

diff --git a/net/dccp/probe.c b/net/dccp/probe.c
deleted file mode 100644 (file)
index 3d3fda0..0000000
--- a/net/dccp/probe.c
+++ /dev/null
@@ -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");