diff options
| author |   Richard Cochran <richardcochran@gmail.com> | 2013-07-19 19:40:09 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-07-22 14:58:19 -0700 |
| commit | cb820f8e4b7f73d1a32175e6591735b25bb5398d (patch) | |
| tree | 0a361e6465be4bd549c17d957708d2e280914f21 /net/core/sock.c | |
| parent | net/velocity: add poll controller function for velocity nic (diff) | |
| download | linux-dev-cb820f8e4b7f73d1a32175e6591735b25bb5398d.tar.xz linux-dev-cb820f8e4b7f73d1a32175e6591735b25bb5398d.zip | |
net: Provide a generic socket error queue delivery method for Tx time stamps.
This patch moves the private error queue delivery function from the
af_packet code to the core socket method. In this way, network layers
only needing the error queue for transmit time stamping can share common
code.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 548d716c5f62..85e8de1bc7fd 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -93,6 +93,7 @@ #include <linux/capability.h> #include <linux/errno.h> +#include <linux/errqueue.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/in.h> @@ -2425,6 +2426,52 @@ void sock_enable_timestamp(struct sock *sk, int flag) } } +int sock_recv_errqueue(struct sock *sk, struct msghdr *msg, int len, + int level, int type) +{ + struct sock_exterr_skb *serr; + struct sk_buff *skb, *skb2; + int copied, err; + + err = -EAGAIN; + skb = skb_dequeue(&sk->sk_error_queue); + if (skb == NULL) + goto out; + + copied = skb->len; + if (copied > len) { + msg->msg_flags |= MSG_TRUNC; + copied = len; + } + err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); + if (err) + goto out_free_skb; + + sock_recv_timestamp(msg, sk, skb); + + serr = SKB_EXT_ERR(skb); + put_cmsg(msg, level, type, sizeof(serr->ee), &serr->ee); + + msg->msg_flags |= MSG_ERRQUEUE; + err = copied; + + /* Reset and regenerate socket error */ + spin_lock_bh(&sk->sk_error_queue.lock); + sk->sk_err = 0; + if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) { + sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; + spin_unlock_bh(&sk->sk_error_queue.lock); + sk->sk_error_report(sk); + } else + spin_unlock_bh(&sk->sk_error_queue.lock); + +out_free_skb: + kfree_skb(skb); +out: + return err; +} +EXPORT_SYMBOL(sock_recv_errqueue); + /* * Get a socket option on an socket. * |