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authorPatrick Ohly <patrick.ohly@intel.com>2009-02-12 05:03:38 +0000
committerDavid S. Miller <davem@davemloft.net>2009-02-15 22:43:35 -0800
commit20d4947353be60e909e6b1a79d241457edd6833f (patch)
tree939ced518fc52e57df9ee9efb0cd14b6e26a3bc4 /include/net
parentac45f602ee3d1b6f326f68bc0c2591ceebf05ba4 (diff)
net: socket infrastructure for SO_TIMESTAMPING
The overlap with the old SO_TIMESTAMP[NS] options is handled so that time stamping in software (net_enable_timestamp()) is enabled when SO_TIMESTAMP[NS] and/or SO_TIMESTAMPING_RX_SOFTWARE is set. It's disabled if all of these are off. Signed-off-by: Patrick Ohly <patrick.ohly@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/sock.h44
1 files changed, 41 insertions, 3 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index ded6854e3e4a..cc9d5bcb06f7 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -158,7 +158,7 @@ struct sock_common {
* @sk_allocation: allocation mode
* @sk_sndbuf: size of send buffer in bytes
* @sk_flags: %SO_LINGER (l_onoff), %SO_BROADCAST, %SO_KEEPALIVE,
- * %SO_OOBINLINE settings
+ * %SO_OOBINLINE settings, %SO_TIMESTAMPING settings
* @sk_no_check: %SO_NO_CHECK setting, wether or not checkup packets
* @sk_route_caps: route capabilities (e.g. %NETIF_F_TSO)
* @sk_gso_type: GSO type (e.g. %SKB_GSO_TCPV4)
@@ -488,6 +488,13 @@ enum sock_flags {
SOCK_RCVTSTAMPNS, /* %SO_TIMESTAMPNS setting */
SOCK_LOCALROUTE, /* route locally only, %SO_DONTROUTE setting */
SOCK_QUEUE_SHRUNK, /* write queue has been shrunk recently */
+ SOCK_TIMESTAMPING_TX_HARDWARE, /* %SOF_TIMESTAMPING_TX_HARDWARE */
+ SOCK_TIMESTAMPING_TX_SOFTWARE, /* %SOF_TIMESTAMPING_TX_SOFTWARE */
+ SOCK_TIMESTAMPING_RX_HARDWARE, /* %SOF_TIMESTAMPING_RX_HARDWARE */
+ SOCK_TIMESTAMPING_RX_SOFTWARE, /* %SOF_TIMESTAMPING_RX_SOFTWARE */
+ SOCK_TIMESTAMPING_SOFTWARE, /* %SOF_TIMESTAMPING_SOFTWARE */
+ SOCK_TIMESTAMPING_RAW_HARDWARE, /* %SOF_TIMESTAMPING_RAW_HARDWARE */
+ SOCK_TIMESTAMPING_SYS_HARDWARE, /* %SOF_TIMESTAMPING_SYS_HARDWARE */
};
static inline void sock_copy_flags(struct sock *nsk, struct sock *osk)
@@ -1346,14 +1353,45 @@ static __inline__ void
sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
{
ktime_t kt = skb->tstamp;
+ struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb);
- if (sock_flag(sk, SOCK_RCVTSTAMP))
+ /*
+ * generate control messages if
+ * - receive time stamping in software requested (SOCK_RCVTSTAMP
+ * or SOCK_TIMESTAMPING_RX_SOFTWARE)
+ * - software time stamp available and wanted
+ * (SOCK_TIMESTAMPING_SOFTWARE)
+ * - hardware time stamps available and wanted
+ * (SOCK_TIMESTAMPING_SYS_HARDWARE or
+ * SOCK_TIMESTAMPING_RAW_HARDWARE)
+ */
+ if (sock_flag(sk, SOCK_RCVTSTAMP) ||
+ sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE) ||
+ (kt.tv64 && sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) ||
+ (hwtstamps->hwtstamp.tv64 &&
+ sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) ||
+ (hwtstamps->syststamp.tv64 &&
+ sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)))
__sock_recv_timestamp(msg, sk, skb);
else
sk->sk_stamp = kt;
}
/**
+ * sock_tx_timestamp - checks whether the outgoing packet is to be time stamped
+ * @msg: outgoing packet
+ * @sk: socket sending this packet
+ * @shtx: filled with instructions for time stamping
+ *
+ * Currently only depends on SOCK_TIMESTAMPING* flags. Returns error code if
+ * parameters are invalid.
+ */
+extern int sock_tx_timestamp(struct msghdr *msg,
+ struct sock *sk,
+ union skb_shared_tx *shtx);
+
+
+/**
* sk_eat_skb - Release a skb if it is no longer needed
* @sk: socket to eat this skb from
* @skb: socket buffer to eat
@@ -1421,7 +1459,7 @@ static inline struct sock *skb_steal_sock(struct sk_buff *skb)
return NULL;
}
-extern void sock_enable_timestamp(struct sock *sk);
+extern void sock_enable_timestamp(struct sock *sk, int flag);
extern int sock_get_timestamp(struct sock *, struct timeval __user *);
extern int sock_get_timestampns(struct sock *, struct timespec __user *);