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Subject[PATCH 1/3] ethtool: Implement ethtool_puts()
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Use strscpy() to implement ethtool_puts().

Functionally the same as ethtool_sprintf() when it's used with two
arguments or with just "%s" format specifier.

Signed-off-by: Justin Stitt <justinstitt@google.com>
---
include/linux/ethtool.h | 13 +++++++++++++
net/ethtool/ioctl.c | 7 +++++++
2 files changed, 20 insertions(+)

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 62b61527bcc4..fdd65050bf1b 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -1052,4 +1052,17 @@ static inline int ethtool_mm_frag_size_min_to_add(u32 val_min, u32 *val_add,
* next string.
*/
extern __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...);
+
+/**
+ * ethtool_puts - Write string to ethtool string data
+ * @data: Pointer to start of string to update
+ * @str: String to write
+ *
+ * Write string to data. Update data to point at start of next
+ * string.
+ *
+ * Prefer this function to ethtool_sprintf() when given only
+ * two arguments or if @fmt is just "%s".
+ */
+extern void ethtool_puts(u8 **data, const char *str);
#endif /* _LINUX_ETHTOOL_H */
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 0b0ce4f81c01..abdf05edf804 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -1991,6 +1991,13 @@ __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...)
}
EXPORT_SYMBOL(ethtool_sprintf);

+void ethtool_puts(u8 **data, const char *str)
+{
+ strscpy(*data, str, ETH_GSTRING_LEN);
+ *data += ETH_GSTRING_LEN;
+}
+EXPORT_SYMBOL(ethtool_puts);
+
static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
{
struct ethtool_value id;
--
2.42.0.758.gaed0368e0e-goog

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