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Merge branch 'ptp-is_sync'

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Kurt Kanzenbach says:

====================
ptp: Add generic is_sync() function

as multiple PHY drivers such as micrel or TI dp83640 need to inspect whether a
given skb represents a PTP Sync message, provide a generic function for it. This
avoids code duplication and can be reused by future PHY IEEE 1588 implementations.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2022-03-07 11:31:34 +00:00
commit cd0b6277c3
4 changed files with 29 additions and 24 deletions
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13
drivers/net/phy/dp83640.c
View File

@ -970,17 +970,6 @@ static void decode_status_frame(struct dp83640_private *dp83640,
}
}
static int is_sync(struct sk_buff *skb, int type)
{
struct ptp_header *hdr;
hdr = ptp_parse_header(skb, type);
if (!hdr)
return 0;
return ptp_get_msgtype(hdr, type) == PTP_MSGTYPE_SYNC;
}
static void dp83640_free_clocks(void)
{
struct dp83640_clock *clock;
@ -1396,7 +1385,7 @@ static void dp83640_txtstamp(struct mii_timestamper *mii_ts,
switch (dp83640->hwts_tx_en) {
case HWTSTAMP_TX_ONESTEP_SYNC:
if (is_sync(skb, type)) {
if (ptp_msg_is_sync(skb, type)) {
kfree_skb(skb);
return;
}

13
drivers/net/phy/micrel.c
View File

@ -1976,17 +1976,6 @@ static int lan8814_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0;
}
static bool is_sync(struct sk_buff *skb, int type)
{
struct ptp_header *hdr;
hdr = ptp_parse_header(skb, type);
if (!hdr)
return false;
return ((ptp_get_msgtype(hdr, type) & 0xf) == 0);
}
static void lan8814_txtstamp(struct mii_timestamper *mii_ts,
struct sk_buff *skb, int type)
{
@ -1994,7 +1983,7 @@ static void lan8814_txtstamp(struct mii_timestamper *mii_ts,
switch (ptp_priv->hwts_tx_type) {
case HWTSTAMP_TX_ONESTEP_SYNC:
if (is_sync(skb, type)) {
if (ptp_msg_is_sync(skb, type)) {
kfree_skb(skb);
return;
}

15
include/linux/ptp_classify.h
View File

@ -126,6 +126,17 @@ static inline u8 ptp_get_msgtype(const struct ptp_header *hdr,
return msgtype;
}
/**
* ptp_msg_is_sync - Evaluates whether the given skb is a PTP Sync message
* @skb: packet buffer
* @type: type of the packet (see ptp_classify_raw())
*
* This function evaluates whether the given skb is a PTP Sync message.
*
* Return: true if sync message, false otherwise
*/
bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type);
void __init ptp_classifier_init(void);
#else
static inline void ptp_classifier_init(void)
@ -148,5 +159,9 @@ static inline u8 ptp_get_msgtype(const struct ptp_header *hdr,
*/
return PTP_MSGTYPE_SYNC;
}
static inline bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type)
{
return false;
}
#endif
#endif /* _PTP_CLASSIFY_H_ */

12
net/core/ptp_classifier.c
View File

@ -137,6 +137,18 @@ struct ptp_header *ptp_parse_header(struct sk_buff *skb, unsigned int type)
}
EXPORT_SYMBOL_GPL(ptp_parse_header);
bool ptp_msg_is_sync(struct sk_buff *skb, unsigned int type)
{
struct ptp_header *hdr;
hdr = ptp_parse_header(skb, type);
if (!hdr)
return false;
return ptp_get_msgtype(hdr, type) == PTP_MSGTYPE_SYNC;
}
EXPORT_SYMBOL_GPL(ptp_msg_is_sync);
void __init ptp_classifier_init(void)
{
static struct sock_filter ptp_filter[] __initdata = {