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Mon, 17 Nov 2025 16:40:05 -0800 (PST) From: Daniel Zahka Date: Mon, 17 Nov 2025 16:40:02 -0800 Subject: [PATCH iproute2-next 1/2] devlink: Pull the value printing logic out of pr_out_param_value() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251117-param-defaults-v1-1-c99604175d09@gmail.com> References: <20251117-param-defaults-v1-0-c99604175d09@gmail.com> In-Reply-To: <20251117-param-defaults-v1-0-c99604175d09@gmail.com> To: Jiri Pirko , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Simon Horman , Donald Hunter , David Ahern Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel Zahka X-Mailer: b4 0.13.0 Split the type demux and value print out of pr_out_param_value() into a new function pr_out_param_value_print(). This new function can be re-used for printing additional kinds of values e.g., a default value reported by the kernel. Signed-off-by: Daniel Zahka --- devlink/devlink.c | 88 ++++++++++++++++++++++++++++++++++-----------------= ---- 1 file changed, 54 insertions(+), 34 deletions(-) diff --git a/devlink/devlink.c b/devlink/devlink.c index fd9fac21..e1612b77 100644 --- a/devlink/devlink.c +++ b/devlink/devlink.c @@ -3518,33 +3518,14 @@ static const struct param_val_conv param_val_conv[]= =3D { =20 #define PARAM_VAL_CONV_LEN ARRAY_SIZE(param_val_conv) =20 -static void pr_out_param_value(struct dl *dl, const char *nla_name, - int nla_type, struct nlattr *nl) +static int pr_out_param_value_print(const char *nla_name, int nla_type, + struct nlattr *val_attr, bool conv_exists, + const char *label) { - struct nlattr *nla_value[DEVLINK_ATTR_MAX + 1] =3D {}; - struct nlattr *val_attr; + char format_str[32]; const char *vstr; - bool conv_exists; int err; =20 - err =3D mnl_attr_parse_nested(nl, attr_cb, nla_value); - if (err !=3D MNL_CB_OK) - return; - - if (!nla_value[DEVLINK_ATTR_PARAM_VALUE_CMODE] || - (nla_type !=3D MNL_TYPE_FLAG && - !nla_value[DEVLINK_ATTR_PARAM_VALUE_DATA])) - return; - - check_indent_newline(dl); - print_string(PRINT_ANY, "cmode", "cmode %s", - param_cmode_name(mnl_attr_get_u8(nla_value[DEVLINK_ATTR_PARAM_VALUE= _CMODE]))); - - val_attr =3D nla_value[DEVLINK_ATTR_PARAM_VALUE_DATA]; - - conv_exists =3D param_val_conv_exists(param_val_conv, PARAM_VAL_CONV_LEN, - nla_name); - switch (nla_type) { case MNL_TYPE_U8: if (conv_exists) { @@ -3554,10 +3535,12 @@ static void pr_out_param_value(struct dl *dl, const= char *nla_name, mnl_attr_get_u8(val_attr), &vstr); if (err) - return; - print_string(PRINT_ANY, "value", " value %s", vstr); + return err; + snprintf(format_str, sizeof(format_str), " %s %%s", label); + print_string(PRINT_ANY, label, format_str, vstr); } else { - print_uint(PRINT_ANY, "value", " value %u", + snprintf(format_str, sizeof(format_str), " %s %%u", label); + print_uint(PRINT_ANY, label, format_str, mnl_attr_get_u8(val_attr)); } break; @@ -3569,10 +3552,12 @@ static void pr_out_param_value(struct dl *dl, const= char *nla_name, mnl_attr_get_u16(val_attr), &vstr); if (err) - return; - print_string(PRINT_ANY, "value", " value %s", vstr); + return err; + snprintf(format_str, sizeof(format_str), " %s %%s", label); + print_string(PRINT_ANY, label, format_str, vstr); } else { - print_uint(PRINT_ANY, "value", " value %u", + snprintf(format_str, sizeof(format_str), " %s %%u", label); + print_uint(PRINT_ANY, label, format_str, mnl_attr_get_u16(val_attr)); } break; @@ -3584,21 +3569,56 @@ static void pr_out_param_value(struct dl *dl, const= char *nla_name, mnl_attr_get_u32(val_attr), &vstr); if (err) - return; - print_string(PRINT_ANY, "value", " value %s", vstr); + return err; + snprintf(format_str, sizeof(format_str), " %s %%s", label); + print_string(PRINT_ANY, label, format_str, vstr); } else { - print_uint(PRINT_ANY, "value", " value %u", + snprintf(format_str, sizeof(format_str), " %s %%u", label); + print_uint(PRINT_ANY, label, format_str, mnl_attr_get_u32(val_attr)); } break; case MNL_TYPE_STRING: - print_string(PRINT_ANY, "value", " value %s", + snprintf(format_str, sizeof(format_str), " %s %%s", label); + print_string(PRINT_ANY, label, format_str, mnl_attr_get_str(val_attr)); break; case MNL_TYPE_FLAG: - print_bool(PRINT_ANY, "value", " value %s", val_attr); + snprintf(format_str, sizeof(format_str), " %s %%s", label); + print_bool(PRINT_ANY, label, format_str, val_attr); break; } + + return 0; +} + +static void pr_out_param_value(struct dl *dl, const char *nla_name, + int nla_type, struct nlattr *nl) +{ + struct nlattr *nla_value[DEVLINK_ATTR_MAX + 1] =3D {}; + struct nlattr *val_attr; + bool conv_exists; + int err; + + err =3D mnl_attr_parse_nested(nl, attr_cb, nla_value); + if (err !=3D MNL_CB_OK) + return; + + if (!nla_value[DEVLINK_ATTR_PARAM_VALUE_CMODE] || + (nla_type !=3D MNL_TYPE_FLAG && + !nla_value[DEVLINK_ATTR_PARAM_VALUE_DATA])) + return; + + check_indent_newline(dl); + print_string(PRINT_ANY, "cmode", "cmode %s", + param_cmode_name(mnl_attr_get_u8(nla_value[DEVLINK_ATTR_PARAM_VALUE= _CMODE]))); + + val_attr =3D nla_value[DEVLINK_ATTR_PARAM_VALUE_DATA]; + + conv_exists =3D param_val_conv_exists(param_val_conv, PARAM_VAL_CONV_LEN, + nla_name); + + pr_out_param_value_print(nla_name, nla_type, val_attr, conv_exists, "valu= e"); } =20 static void pr_out_param(struct dl *dl, struct nlattr **tb, bool array, --=20 2.47.3