add ax88772_rst

hc

2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29

 kernel/include/net/red.h
..
..
@@ -189,6 +189,44 @@
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 	return true;
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 }
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+static inline int red_get_flags(unsigned char qopt_flags,
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+				unsigned char historic_mask,
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+				struct nlattr *flags_attr,
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+				unsigned char supported_mask,
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+				struct nla_bitfield32 *p_flags,
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+				unsigned char *p_userbits,
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+				struct netlink_ext_ack *extack)
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+{
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+	struct nla_bitfield32 flags;
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+
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+	if (qopt_flags && flags_attr) {
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+		NL_SET_ERR_MSG_MOD(extack, "flags should be passed either through qopt, or through a dedicated attribute");
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+		return -EINVAL;
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+	}
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+
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+	if (flags_attr) {
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+		flags = nla_get_bitfield32(flags_attr);
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+	} else {
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+		flags.selector = historic_mask;
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+		flags.value = qopt_flags & historic_mask;
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+	}
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+
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+	*p_flags = flags;
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+	*p_userbits = qopt_flags & ~historic_mask;
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+	return 0;
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+}
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+
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+static inline int red_validate_flags(unsigned char flags,
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+				     struct netlink_ext_ack *extack)
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+{
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+	if ((flags & TC_RED_NODROP) && !(flags & TC_RED_ECN)) {
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+		NL_SET_ERR_MSG_MOD(extack, "nodrop mode is only meaningful with ECN");
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+		return -EINVAL;
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+	}
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+
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+	return 0;
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+}
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+
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 static inline void red_set_parms(struct red_parms *p,
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 				 u32 qth_min, u32 qth_max, u8 Wlog, u8 Plog,
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 				 u8 Scell_log, u8 *stab, u32 max_P)