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| author | Kurt Kanzenbach <kurt@linutronix.de> | 2022-03-05 12:21:25 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-03-07 11:31:34 +0000 |
| commit | f72de02ebece2e962462bc0c1e9efd29eaa029b2 (patch) | |
| tree | 5a7102eaf367b9301bf49c8d9d6ca328a016fad5 | |
| parent | 669b258a793db9f1c3bff29ce2bbd61b810503ad (diff) | |
| download | linux-f72de02ebece2e962462bc0c1e9efd29eaa029b2.tar.gz linux-f72de02ebece2e962462bc0c1e9efd29eaa029b2.tar.bz2 linux-f72de02ebece2e962462bc0c1e9efd29eaa029b2.zip | |
ptp: Add generic PTP is_sync() function
PHY drivers such as micrel or dp83640 need to analyze whether a given
skb is a PTP sync message for one step functionality.
In order to avoid code duplication introduce a generic function and
move it to ptp classify.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/ptp_classify.h | 15 | ||||
| -rw-r--r-- | net/core/ptp_classifier.c | 12 |
2 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/ptp_classify.h b/include/linux/ptp_classify.h index 9afd34a2d36c..fefa7790dc46 100644 --- a/include/linux/ptp_classify.h +++ b/include/linux/ptp_classify.h @@ -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_ */ diff --git a/net/core/ptp_classifier.c b/net/core/ptp_classifier.c index dd4cf01d1e0a..598041b0499e 100644 --- a/net/core/ptp_classifier.c +++ b/net/core/ptp_classifier.c @@ -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 = { |