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Message-ID: <4F46F941.1020401@gmail.com>
Date: Fri, 24 Feb 2012 10:43:13 +0800
From: Li Yu <raise.sail@...il.com>
To: netdev@...r.kernel.org
CC: David Miller <davem@...emloft.net>
Subject: [PATCH net-next v2] 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 applications-aware data statistics
instead of traffic statistics on wire.
The changes of v2 are:
1. Move up accounting source code, so they are not protocol-aware now.
2. Skipping interrupt context accounting.
That is all, thanks
Signed-off-by: Li Yu <bingtian.ly@...bao.com>
include/linux/sched.h | 2 ++
include/linux/taskstats.h | 7 ++++++-
include/net/sock.h | 12 ++++++++++++
kernel/fork.c | 1 +
kernel/taskstats.c | 6 ++++++
net/socket.c | 27 ++++++++++++++++++++++-----
6 files changed, 49 insertions(+), 6 deletions(-)
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..1f52c2a 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1735,6 +1735,18 @@ 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)
+{
+ if (!in_irq() && len > 0)
+ current->rx_bytes += len;
+}
+
+static inline void task_net_accounting_tx(unsigned int len)
+{
+ if (!in_irq() && len > 0)
+ current->tx_bytes += len;
+}
+
/**
* 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/socket.c b/net/socket.c
index 28a96af..c1b736d 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -548,6 +548,7 @@ static inline int __sock_sendmsg_nosec(struct kiocb
*iocb, struct socket *sock,
struct msghdr *msg, size_t size)
{
struct sock_iocb *si = kiocb_to_siocb(iocb);
+ int ret;
sock_update_classid(sock->sk);
@@ -558,7 +559,10 @@ static inline int __sock_sendmsg_nosec(struct kiocb
*iocb, struct socket *sock,
si->msg = msg;
si->size = size;
- return sock->ops->sendmsg(iocb, sock, msg, size);
+ ret = sock->ops->sendmsg(iocb, sock, msg, size);
+ task_net_accounting_tx(ret);
+
+ return ret;
}
static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
@@ -714,6 +718,7 @@ static inline int __sock_recvmsg_nosec(struct kiocb
*iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock_iocb *si = kiocb_to_siocb(iocb);
+ int ret;
sock_update_classid(sock->sk);
@@ -723,7 +728,10 @@ static inline int __sock_recvmsg_nosec(struct kiocb
*iocb, struct socket *sock,
si->size = size;
si->flags = flags;
- return sock->ops->recvmsg(iocb, sock, msg, size, flags);
+ ret = sock->ops->recvmsg(iocb, sock, msg, size, flags);
+ task_net_accounting_rx(ret);
+
+ return ret;
}
static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
@@ -823,13 +831,17 @@ static ssize_t sock_splice_read(struct file *file,
loff_t *ppos,
unsigned int flags)
{
struct socket *sock = file->private_data;
+ int ret;
if (unlikely(!sock->ops->splice_read))
return -EINVAL;
sock_update_classid(sock->sk);
- return sock->ops->splice_read(sock, ppos, pipe, len, flags);
+ ret = sock->ops->splice_read(sock, ppos, pipe, len, flags);
+ task_net_accounting_rx(ret);
+
+ return ret;
}
static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
@@ -3361,10 +3373,15 @@ EXPORT_SYMBOL(kernel_setsockopt);
int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags)
{
+ int ret;
+
sock_update_classid(sock->sk);
- if (sock->ops->sendpage)
- return sock->ops->sendpage(sock, page, offset, size, flags);
+ if (sock->ops->sendpage) {
+ ret = sock->ops->sendpage(sock, page, offset, size, flags);
+ task_net_accounting_tx(ret);
+ return ret;
+ }
return sock_no_sendpage(sock, page, offset, size, flags);
}
--
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