#include <linux/module.h>
#include <linux/ktime.h>
#include <linux/time.h>
+#include <net/net_namespace.h>
#include <net/tcp.h>
p->snd_una = tp->snd_una;
p->snd_cwnd = tp->snd_cwnd;
p->snd_wnd = tp->snd_wnd;
+ p->ssthresh = tcp_current_ssthresh(sk);
p->srtt = tp->srtt >> 3;
tcp_probe.head = (tcp_probe.head + 1) % bufsize;
.kp = {
.symbol_name = "tcp_rcv_established",
},
- .entry = JPROBE_ENTRY(jtcp_rcv_established),
+ .entry = jtcp_rcv_established,
};
static int tcpprobe_open(struct inode * inode, struct file * file)
= ktime_to_timespec(ktime_sub(p->tstamp, tcp_probe.start));
return snprintf(tbuf, n,
- "%lu.%09lu %d.%d.%d.%d:%u %d.%d.%d.%d:%u"
- " %d %#x %#x %u %u %u %u\n",
+ "%lu.%09lu %pI4:%u %pI4:%u %d %#x %#x %u %u %u %u\n",
(unsigned long) tv.tv_sec,
(unsigned long) tv.tv_nsec,
- NIPQUAD(p->saddr), ntohs(p->sport),
- NIPQUAD(p->daddr), ntohs(p->dport),
+ &p->saddr, ntohs(p->sport),
+ &p->daddr, ntohs(p->dport),
p->length, p->snd_nxt, p->snd_una,
p->snd_cwnd, p->ssthresh, p->snd_wnd, p->srtt);
}
static ssize_t tcpprobe_read(struct file *file, char __user *buf,
size_t len, loff_t *ppos)
{
- int error = 0, cnt = 0;
+ int error = 0;
+ size_t cnt = 0;
- if (!buf || len < 0)
+ if (!buf)
return -EINVAL;
while (cnt < len) {
width = tcpprobe_sprint(tbuf, sizeof(tbuf));
- if (width < len)
+ if (cnt + width < len)
tcp_probe.tail = (tcp_probe.tail + 1) % bufsize;
spin_unlock_bh(&tcp_probe.lock);
/* if record greater than space available
return partial buffer (so far) */
- if (width >= len)
+ if (cnt + width >= len)
break;
- error = copy_to_user(buf + cnt, tbuf, width);
- if (error)
- break;
+ if (copy_to_user(buf + cnt, tbuf, width))
+ return -EFAULT;
cnt += width;
}
if (bufsize < 0)
return -EINVAL;
- tcp_probe.log = kcalloc(sizeof(struct tcp_log), bufsize, GFP_KERNEL);
+ tcp_probe.log = kcalloc(bufsize, sizeof(struct tcp_log), GFP_KERNEL);
if (!tcp_probe.log)
goto err0;
- if (!proc_net_fops_create(procname, S_IRUSR, &tcpprobe_fops))
+ if (!proc_net_fops_create(&init_net, procname, S_IRUSR, &tcpprobe_fops))
goto err0;
ret = register_jprobe(&tcp_jprobe);
pr_info("TCP probe registered (port=%d)\n", port);
return 0;
err1:
- proc_net_remove(procname);
+ proc_net_remove(&init_net, procname);
err0:
kfree(tcp_probe.log);
return ret;
static __exit void tcpprobe_exit(void)
{
- proc_net_remove(procname);
+ proc_net_remove(&init_net, procname);
unregister_jprobe(&tcp_jprobe);
kfree(tcp_probe.log);
}