Merge branch 'net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vxy/lksctp-dev
David S. Miller [Mon, 3 May 2010 23:20:44 +0000 (16:20 -0700)]
Add missing linux/vmalloc.h include to net/sctp/probe.c

Signed-off-by: David S. Miller <davem@davemloft.net>

1  2 
include/net/sctp/sctp.h
include/net/sctp/structs.h
net/sctp/associola.c
net/sctp/endpointola.c
net/sctp/probe.c
net/sctp/sm_make_chunk.c
net/sctp/sm_sideeffect.c
net/sctp/socket.c

Simple merge
Simple merge
Simple merge
Simple merge
index 0000000,8f025d5..db3a42b
mode 000000,100644..100644
--- /dev/null
@@@ -1,0 -1,213 +1,214 @@@
+ /*
+  * sctp_probe - Observe the SCTP flow with kprobes.
+  *
+  * The idea for this came from Werner Almesberger's umlsim
+  * Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
+  *
+  * Modified for SCTP from Stephen Hemminger's code
+  * Copyright (C) 2010, Wei Yongjun <yjwei@cn.fujitsu.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.
+  *
+  * 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/sctp.h>
+ #include <linux/proc_fs.h>
++#include <linux/vmalloc.h>
+ #include <linux/module.h>
+ #include <linux/kfifo.h>
+ #include <linux/time.h>
+ #include <net/net_namespace.h>
+ #include <net/sctp/sctp.h>
+ #include <net/sctp/sm.h>
+ MODULE_AUTHOR("Wei Yongjun <yjwei@cn.fujitsu.com>");
+ MODULE_DESCRIPTION("SCTP snooper");
+ MODULE_LICENSE("GPL");
+ static int port __read_mostly = 0;
+ MODULE_PARM_DESC(port, "Port to match (0=all)");
+ module_param(port, int, 0);
+ static int bufsize __read_mostly = 64 * 1024;
+ MODULE_PARM_DESC(bufsize, "Log buffer size (default 64k)");
+ module_param(bufsize, int, 0);
+ static int full __read_mostly = 1;
+ MODULE_PARM_DESC(full, "Full log (1=every ack packet received,  0=only cwnd changes)");
+ module_param(full, int, 0);
+ static const char procname[] = "sctpprobe";
+ static struct {
+       struct kfifo      fifo;
+       spinlock_t        lock;
+       wait_queue_head_t wait;
+       struct timespec   tstart;
+ } sctpw;
+ static void printl(const char *fmt, ...)
+ {
+       va_list args;
+       int len;
+       char tbuf[256];
+       va_start(args, fmt);
+       len = vscnprintf(tbuf, sizeof(tbuf), fmt, args);
+       va_end(args);
+       kfifo_in_locked(&sctpw.fifo, tbuf, len, &sctpw.lock);
+       wake_up(&sctpw.wait);
+ }
+ static int sctpprobe_open(struct inode *inode, struct file *file)
+ {
+       kfifo_reset(&sctpw.fifo);
+       getnstimeofday(&sctpw.tstart);
+       return 0;
+ }
+ static ssize_t sctpprobe_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(sctpw.wait,
+                                        kfifo_len(&sctpw.fifo) != 0);
+       if (error)
+               goto out_free;
+       cnt = kfifo_out_locked(&sctpw.fifo, tbuf, len, &sctpw.lock);
+       error = copy_to_user(buf, tbuf, cnt) ? -EFAULT : 0;
+ out_free:
+       vfree(tbuf);
+       return error ? error : cnt;
+ }
+ static const struct file_operations sctpprobe_fops = {
+       .owner  = THIS_MODULE,
+       .open   = sctpprobe_open,
+       .read   = sctpprobe_read,
+ };
+ sctp_disposition_t jsctp_sf_eat_sack(const struct sctp_endpoint *ep,
+                                    const struct sctp_association *asoc,
+                                    const sctp_subtype_t type,
+                                    void *arg,
+                                    sctp_cmd_seq_t *commands)
+ {
+       struct sctp_transport *sp;
+       static __u32 lcwnd = 0;
+       struct timespec now;
+       sp = asoc->peer.primary_path;
+       if ((full || sp->cwnd != lcwnd) &&
+           (!port || asoc->peer.port == port ||
+            ep->base.bind_addr.port == port)) {
+               lcwnd = sp->cwnd;
+               getnstimeofday(&now);
+               now = timespec_sub(now, sctpw.tstart);
+               printl("%lu.%06lu ", (unsigned long) now.tv_sec,
+                      (unsigned long) now.tv_nsec / NSEC_PER_USEC);
+               printl("%p %5d %5d %5d %8d %5d ", asoc,
+                      ep->base.bind_addr.port, asoc->peer.port,
+                      asoc->pathmtu, asoc->peer.rwnd, asoc->unack_data);
+               list_for_each_entry(sp, &asoc->peer.transport_addr_list,
+                                       transports) {
+                       if (sp == asoc->peer.primary_path)
+                               printl("*");
+                       if (sp->ipaddr.sa.sa_family == AF_INET)
+                               printl("%pI4 ", &sp->ipaddr.v4.sin_addr);
+                       else
+                               printl("%pI6 ", &sp->ipaddr.v6.sin6_addr);
+                       printl("%2u %8u %8u %8u %8u %8u ",
+                              sp->state, sp->cwnd, sp->ssthresh,
+                              sp->flight_size, sp->partial_bytes_acked,
+                              sp->pathmtu);
+               }
+               printl("\n");
+       }
+       jprobe_return();
+       return 0;
+ }
+ static struct jprobe sctp_recv_probe = {
+       .kp     = {
+               .symbol_name = "sctp_sf_eat_sack_6_2",
+       },
+       .entry  = jsctp_sf_eat_sack,
+ };
+ static __init int sctpprobe_init(void)
+ {
+       int ret = -ENOMEM;
+       init_waitqueue_head(&sctpw.wait);
+       spin_lock_init(&sctpw.lock);
+       if (kfifo_alloc(&sctpw.fifo, bufsize, GFP_KERNEL))
+               return ret;
+       if (!proc_net_fops_create(&init_net, procname, S_IRUSR,
+                                 &sctpprobe_fops))
+               goto free_kfifo;
+       ret = register_jprobe(&sctp_recv_probe);
+       if (ret)
+               goto remove_proc;
+       pr_info("SCTP probe registered (port=%d)\n", port);
+       return 0;
+ remove_proc:
+       proc_net_remove(&init_net, procname);
+ free_kfifo:
+       kfifo_free(&sctpw.fifo);
+       return ret;
+ }
+ static __exit void sctpprobe_exit(void)
+ {
+       kfifo_free(&sctpw.fifo);
+       proc_net_remove(&init_net, procname);
+       unregister_jprobe(&sctp_recv_probe);
+ }
+ module_init(sctpprobe_init);
+ module_exit(sctpprobe_exit);
Simple merge
Simple merge
Simple merge