diff mbox series

[net-next,1/3] ptp: Add generic PTP is_sync() function

Message ID 20220305112127.68529-2-kurt@linutronix.de (mailing list archive)
State Accepted
Commit f72de02ebece2e962462bc0c1e9efd29eaa029b2
Delegated to: Netdev Maintainers
Headers show
Series ptp: Add generic is_sync() function | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 38 this patch: 38
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 20 this patch: 20
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 43 this patch: 43
netdev/checkpatch warning CHECK: Please use a blank line after function/struct/union/enum declarations
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Kurt Kanzenbach March 5, 2022, 11:21 a.m. UTC 
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>
---
 include/linux/ptp_classify.h | 15 +++++++++++++++
 net/core/ptp_classifier.c    | 12 ++++++++++++
 2 files changed, 27 insertions(+)
diff mbox series

Patch

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 = {