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Date: Thu, 23 Feb 2012 16:22:23 +0800
From: Li Yu <raise.sail@...il.com>
To: netdev@...r.kernel.org
Subject: [PATCH] extend taskstats API to support networking accounts
This patch adds L7 traffic accounting in taskstats API, so
the iotop like applications can receive these statistics data.
In fact, I also have an iotop patch for this change.
It ignores any protocol header overhead, so results of this
patch should be saw as the application-aware data statistics
instead of traffic statistics on wire. And it also ignores any
IPC traffic on local host.
This patch only records TCP/UDP/Raw-IP traffic so far, and adding
other protocol support is easy.
Signed-off-by: Li Yu <bingtian.ly@...bao.com>
include/linux/sched.h | 2 ++
include/linux/taskstats.h | 7 ++++++-
include/net/sock.h | 10 ++++++++++
kernel/fork.c | 1 +
kernel/taskstats.c | 6 ++++++
net/ipv4/raw.c | 3 +++
net/ipv4/tcp.c | 8 +++++++-
net/ipv4/udp.c | 10 ++++++++--
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 7d379a6..5b2dbc5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1590,6 +1590,8 @@ struct task_struct {
#ifdef CONFIG_HAVE_HW_BREAKPOINT
atomic_t ptrace_bp_refcnt;
#endif
+ u64 rx_bytes;
+ u64 tx_bytes;
};
/* Future-safe accessor for struct task_struct's cpus_allowed. */
diff --git a/include/linux/taskstats.h b/include/linux/taskstats.h
index 2466e55..39b356c 100644
--- a/include/linux/taskstats.h
+++ b/include/linux/taskstats.h
@@ -33,7 +33,7 @@
*/
-#define TASKSTATS_VERSION 8
+#define TASKSTATS_VERSION 9
#define TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN
* in linux/sched.h */
@@ -163,6 +163,11 @@ struct taskstats {
/* Delay waiting for memory reclaim */
__u64 freepages_count;
__u64 freepages_delay_total;
+ /* Version 8 ends here */
+
+ /* Net accounting */
+ __u64 rx_bytes;
+ __u64 tx_bytes;
};
diff --git a/include/net/sock.h b/include/net/sock.h
index 91c1c8b..7b4f3b0 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1735,6 +1735,16 @@ static inline int skb_copy_to_page(struct sock
*sk, char __user *from,
return 0;
}
+static inline void task_net_accounting_rx(unsigned int len)
+{
+ current->rx_bytes += len; /* Ignore PDU header */
+}
+
+static inline void task_net_accounting_tx(unsigned int len)
+{
+ current->tx_bytes += len; /* Ignore PDU header */
+}
+
/**
* sk_wmem_alloc_get - returns write allocations
* @sk: socket
diff --git a/kernel/fork.c b/kernel/fork.c
index b77fd55..5788f3e 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1168,6 +1168,7 @@ static struct task_struct *copy_process(unsigned
long clone_flags,
p->default_timer_slack_ns = current->timer_slack_ns;
task_io_accounting_init(&p->ioac);
+ p->rx_bytes = p->tx_bytes = 0;
acct_clear_integrals(p);
posix_cpu_timers_init(p);
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index e660464..4d1fcd2 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -194,6 +194,9 @@ static void fill_stats(struct task_struct *tsk,
struct taskstats *stats)
/* fill in extended acct fields */
xacct_add_tsk(stats, tsk);
+
+ stats->rx_bytes = tsk->rx_bytes;
+ stats->tx_bytes = tsk->tx_bytes;
}
static int fill_stats_for_pid(pid_t pid, struct taskstats *stats)
@@ -247,6 +250,9 @@ static int fill_stats_for_tgid(pid_t tgid, struct
taskstats *stats)
stats->nvcsw += tsk->nvcsw;
stats->nivcsw += tsk->nivcsw;
+
+ stats->rx_bytes += tsk->rx_bytes;
+ stats->tx_bytes += tsk->tx_bytes;
} while_each_thread(first, tsk);
unlock_task_sighand(first, &flags);
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index ab46630..6d62190 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -622,6 +622,7 @@ done:
out:
if (err < 0)
return err;
+ task_net_accounting_tx(len);
return len;
do_confirm:
@@ -729,6 +730,8 @@ done:
out:
if (err)
return err;
+ if (!(flags & MSG_PEEK))
+ task_net_accounting_rx(copied);
return copied;
}
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 37755cc..240384d 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -682,8 +682,10 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t
*ppos,
release_sock(sk);
- if (spliced)
+ if (spliced) {
+ task_net_accounting_rx(spliced);
return spliced;
+ }
return ret;
}
@@ -860,6 +862,7 @@ wait_for_memory:
out:
if (copied)
tcp_push(sk, flags, mss_now, tp->nonagle);
+ task_net_accounting_tx(copied);
return copied;
do_error:
@@ -1114,6 +1117,7 @@ out:
if (copied)
tcp_push(sk, flags, mss_now, tp->nonagle);
release_sock(sk);
+ task_net_accounting_tx(copied);
return copied;
do_fault:
@@ -1771,6 +1775,8 @@ skip_copy:
tcp_cleanup_rbuf(sk, copied);
release_sock(sk);
+ if (!(flags & MSG_PEEK))
+ task_net_accounting_rx(copied);
return copied;
out:
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index cd99f1a..d2d09a3 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1006,8 +1006,10 @@ out:
ip_rt_put(rt);
if (free)
kfree(ipc.opt);
- if (!err)
+ if (!err) {
+ task_net_accounting_tx(len);
return len;
+ }
/*
* ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
* ENOBUFS might not be good (it's not tunable per se), but otherwise
@@ -1073,8 +1075,10 @@ int udp_sendpage(struct sock *sk, struct page
*page, int offset,
up->len += size;
if (!(up->corkflag || (flags&MSG_MORE)))
ret = udp_push_pending_frames(sk);
- if (!ret)
+ if (!ret) {
ret = size;
+ task_net_accounting_tx(size);
+ }
out:
release_sock(sk);
return ret;
@@ -1237,6 +1241,8 @@ try_again:
ip_cmsg_recv(msg, skb);
err = copied;
+ if (!(flags & MSG_PEEK))
+ task_net_accounting_rx(copied);
if (flags & MSG_TRUNC)
err = ulen;
--
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