net: sctp: Remove debug SCTP probe module
Remove SCTP probe module since jprobe has been deprecated. That function is now replaced by sctp/sctp_probe and sctp/sctp_probe_path trace-events. 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
Родитель
103d750c88
Коммит
fa4475f792
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@ -37,18 +37,6 @@ menuconfig IP_SCTP
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if IP_SCTP
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config NET_SCTPPROBE
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tristate "SCTP: Association probing"
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depends on PROC_FS && KPROBES
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---help---
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This module allows for capturing the changes to SCTP association
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state in response to incoming packets. It is used for debugging
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SCTP congestion control algorithms. If you don't understand
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what was just said, you don't need it: say N.
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To compile this code as a module, choose M here: the
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module will be called sctp_probe.
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config SCTP_DBG_OBJCNT
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bool "SCTP: Debug object counts"
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depends on PROC_FS
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@ -4,7 +4,6 @@
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#
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obj-$(CONFIG_IP_SCTP) += sctp.o
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obj-$(CONFIG_NET_SCTPPROBE) += sctp_probe.o
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obj-$(CONFIG_INET_SCTP_DIAG) += sctp_diag.o
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sctp-y := sm_statetable.o sm_statefuns.o sm_sideeffect.o \
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@ -16,8 +15,6 @@ sctp-y := sm_statetable.o sm_statefuns.o sm_sideeffect.o \
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offload.o stream_sched.o stream_sched_prio.o \
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stream_sched_rr.o stream_interleave.o
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sctp_probe-y := probe.o
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sctp-$(CONFIG_SCTP_DBG_OBJCNT) += objcnt.o
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sctp-$(CONFIG_PROC_FS) += proc.o
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sctp-$(CONFIG_SYSCTL) += sysctl.o
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244
net/sctp/probe.c
244
net/sctp/probe.c
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@ -1,244 +0,0 @@
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/*
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* sctp_probe - Observe the SCTP flow with kprobes.
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*
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* The idea for this came from Werner Almesberger's umlsim
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* Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
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*
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* Modified for SCTP from Stephen Hemminger's code
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* Copyright (C) 2010, Wei Yongjun <yjwei@cn.fujitsu.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/kprobes.h>
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#include <linux/socket.h>
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#include <linux/sctp.h>
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#include <linux/proc_fs.h>
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#include <linux/vmalloc.h>
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#include <linux/module.h>
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#include <linux/kfifo.h>
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#include <linux/time.h>
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#include <net/net_namespace.h>
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#include <net/sctp/sctp.h>
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#include <net/sctp/sm.h>
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MODULE_SOFTDEP("pre: sctp");
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MODULE_AUTHOR("Wei Yongjun <yjwei@cn.fujitsu.com>");
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MODULE_DESCRIPTION("SCTP snooper");
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MODULE_LICENSE("GPL");
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static int port __read_mostly = 0;
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MODULE_PARM_DESC(port, "Port to match (0=all)");
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module_param(port, int, 0);
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static unsigned int fwmark __read_mostly = 0;
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MODULE_PARM_DESC(fwmark, "skb mark to match (0=no mark)");
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module_param(fwmark, uint, 0);
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static int bufsize __read_mostly = 64 * 1024;
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MODULE_PARM_DESC(bufsize, "Log buffer size (default 64k)");
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module_param(bufsize, int, 0);
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static int full __read_mostly = 1;
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MODULE_PARM_DESC(full, "Full log (1=every ack packet received, 0=only cwnd changes)");
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module_param(full, int, 0);
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static const char procname[] = "sctpprobe";
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static struct {
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struct kfifo fifo;
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spinlock_t lock;
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wait_queue_head_t wait;
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struct timespec64 tstart;
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} sctpw;
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static __printf(1, 2) void printl(const char *fmt, ...)
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{
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va_list args;
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int len;
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char tbuf[256];
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va_start(args, fmt);
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len = vscnprintf(tbuf, sizeof(tbuf), fmt, args);
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va_end(args);
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kfifo_in_locked(&sctpw.fifo, tbuf, len, &sctpw.lock);
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wake_up(&sctpw.wait);
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}
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static int sctpprobe_open(struct inode *inode, struct file *file)
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{
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kfifo_reset(&sctpw.fifo);
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ktime_get_ts64(&sctpw.tstart);
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return 0;
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}
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static ssize_t sctpprobe_read(struct file *file, char __user *buf,
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size_t len, loff_t *ppos)
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{
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int error = 0, cnt = 0;
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unsigned char *tbuf;
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if (!buf)
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return -EINVAL;
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if (len == 0)
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return 0;
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tbuf = vmalloc(len);
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if (!tbuf)
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return -ENOMEM;
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error = wait_event_interruptible(sctpw.wait,
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kfifo_len(&sctpw.fifo) != 0);
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if (error)
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goto out_free;
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cnt = kfifo_out_locked(&sctpw.fifo, tbuf, len, &sctpw.lock);
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error = copy_to_user(buf, tbuf, cnt) ? -EFAULT : 0;
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out_free:
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vfree(tbuf);
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return error ? error : cnt;
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}
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static const struct file_operations sctpprobe_fops = {
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.owner = THIS_MODULE,
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.open = sctpprobe_open,
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.read = sctpprobe_read,
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.llseek = noop_llseek,
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};
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static enum sctp_disposition jsctp_sf_eat_sack(
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struct net *net,
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const struct sctp_endpoint *ep,
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const struct sctp_association *asoc,
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const union sctp_subtype type,
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void *arg,
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struct sctp_cmd_seq *commands)
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{
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struct sctp_chunk *chunk = arg;
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struct sk_buff *skb = chunk->skb;
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struct sctp_transport *sp;
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static __u32 lcwnd = 0;
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struct timespec64 now;
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sp = asoc->peer.primary_path;
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if (((port == 0 && fwmark == 0) ||
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asoc->peer.port == port ||
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ep->base.bind_addr.port == port ||
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(fwmark > 0 && skb->mark == fwmark)) &&
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(full || sp->cwnd != lcwnd)) {
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lcwnd = sp->cwnd;
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ktime_get_ts64(&now);
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now = timespec64_sub(now, sctpw.tstart);
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printl("%lu.%06lu ", (unsigned long) now.tv_sec,
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(unsigned long) now.tv_nsec / NSEC_PER_USEC);
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printl("%p %5d %5d %5d %8d %5d ", asoc,
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ep->base.bind_addr.port, asoc->peer.port,
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asoc->pathmtu, asoc->peer.rwnd, asoc->unack_data);
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list_for_each_entry(sp, &asoc->peer.transport_addr_list,
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transports) {
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if (sp == asoc->peer.primary_path)
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printl("*");
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printl("%pISc %2u %8u %8u %8u %8u %8u ",
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&sp->ipaddr, sp->state, sp->cwnd, sp->ssthresh,
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sp->flight_size, sp->partial_bytes_acked,
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sp->pathmtu);
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}
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printl("\n");
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}
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jprobe_return();
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return 0;
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}
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static struct jprobe sctp_recv_probe = {
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.kp = {
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.symbol_name = "sctp_sf_eat_sack_6_2",
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},
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.entry = jsctp_sf_eat_sack,
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};
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static __init int sctp_setup_jprobe(void)
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{
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int ret = register_jprobe(&sctp_recv_probe);
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if (ret) {
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if (request_module("sctp"))
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goto out;
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ret = register_jprobe(&sctp_recv_probe);
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}
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out:
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return ret;
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}
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static __init int sctpprobe_init(void)
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{
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int ret = -ENOMEM;
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/* Warning: if the function signature of sctp_sf_eat_sack_6_2,
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* has been changed, you also have to change the signature of
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* jsctp_sf_eat_sack, otherwise you end up right here!
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*/
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BUILD_BUG_ON(__same_type(sctp_sf_eat_sack_6_2,
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jsctp_sf_eat_sack) == 0);
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init_waitqueue_head(&sctpw.wait);
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spin_lock_init(&sctpw.lock);
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if (kfifo_alloc(&sctpw.fifo, bufsize, GFP_KERNEL))
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return ret;
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if (!proc_create(procname, S_IRUSR, init_net.proc_net,
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&sctpprobe_fops))
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goto free_kfifo;
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ret = sctp_setup_jprobe();
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if (ret)
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goto remove_proc;
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pr_info("probe registered (port=%d/fwmark=%u) bufsize=%u\n",
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port, fwmark, bufsize);
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return 0;
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remove_proc:
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remove_proc_entry(procname, init_net.proc_net);
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free_kfifo:
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kfifo_free(&sctpw.fifo);
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return ret;
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}
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static __exit void sctpprobe_exit(void)
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{
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kfifo_free(&sctpw.fifo);
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remove_proc_entry(procname, init_net.proc_net);
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unregister_jprobe(&sctp_recv_probe);
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}
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module_init(sctpprobe_init);
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module_exit(sctpprobe_exit);
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