* [PATCH ethtool] features: accept long legacy flag names when setting features
@ 2020-04-13 21:21 Michal Kubecek
2020-05-13 19:57 ` John W. Linville
0 siblings, 1 reply; 2+ messages in thread
From: Michal Kubecek @ 2020-04-13 21:21 UTC (permalink / raw)
To: John Linville; +Cc: netdev, Konstantin Kharlamov
The legacy feature flags have long names (e.g. "generic-receive-offload")
and short names (e.g. "gro"). While "ethtool -k" shows only long names,
"ethtool -K" accepts only short names. This is a bit confusing as users
have to resort to documentation to see what flag name to use; in
particular, if a legacy flag corresponds to only one actual kernel feature,
"ethtool -k" shows the output in the same form as if long flag name were
a kernel feature name but this name cannot be used to set the flag/feature.
Accept both short and long legacy flag names in "ethool -K".
Reported-by: Konstantin Kharlamov <hi-angel@yandex.ru>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
---
ethtool.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/ethtool.c b/ethtool.c
index 1b4e08b6e60f..73f15b3912c1 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -2297,26 +2297,33 @@ static int do_sfeatures(struct cmd_context *ctx)
/* Generate cmdline_info for legacy flags and kernel-named
* features, and parse our arguments.
*/
- cmdline_features = calloc(ARRAY_SIZE(off_flag_def) + defs->n_features,
+ cmdline_features = calloc(2 * ARRAY_SIZE(off_flag_def) +
+ defs->n_features,
sizeof(cmdline_features[0]));
if (!cmdline_features) {
perror("Cannot parse arguments");
rc = 1;
goto err;
}
- for (i = 0; i < ARRAY_SIZE(off_flag_def); i++)
+ j = 0;
+ for (i = 0; i < ARRAY_SIZE(off_flag_def); i++) {
flag_to_cmdline_info(off_flag_def[i].short_name,
off_flag_def[i].value,
&off_flags_wanted, &off_flags_mask,
- &cmdline_features[i]);
+ &cmdline_features[j++]);
+ flag_to_cmdline_info(off_flag_def[i].long_name,
+ off_flag_def[i].value,
+ &off_flags_wanted, &off_flags_mask,
+ &cmdline_features[j++]);
+ }
for (i = 0; i < defs->n_features; i++)
flag_to_cmdline_info(
defs->def[i].name, FEATURE_FIELD_FLAG(i),
&FEATURE_WORD(efeatures->features, i, requested),
&FEATURE_WORD(efeatures->features, i, valid),
- &cmdline_features[ARRAY_SIZE(off_flag_def) + i]);
+ &cmdline_features[j++]);
parse_generic_cmdline(ctx, &any_changed, cmdline_features,
- ARRAY_SIZE(off_flag_def) + defs->n_features);
+ 2 * ARRAY_SIZE(off_flag_def) + defs->n_features);
free(cmdline_features);
if (!any_changed) {
--
2.26.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH ethtool] features: accept long legacy flag names when setting features
2020-04-13 21:21 [PATCH ethtool] features: accept long legacy flag names when setting features Michal Kubecek
@ 2020-05-13 19:57 ` John W. Linville
0 siblings, 0 replies; 2+ messages in thread
From: John W. Linville @ 2020-05-13 19:57 UTC (permalink / raw)
To: Michal Kubecek; +Cc: netdev, Konstantin Kharlamov
On Mon, Apr 13, 2020 at 11:21:20PM +0200, Michal Kubecek wrote:
> The legacy feature flags have long names (e.g. "generic-receive-offload")
> and short names (e.g. "gro"). While "ethtool -k" shows only long names,
> "ethtool -K" accepts only short names. This is a bit confusing as users
> have to resort to documentation to see what flag name to use; in
> particular, if a legacy flag corresponds to only one actual kernel feature,
> "ethtool -k" shows the output in the same form as if long flag name were
> a kernel feature name but this name cannot be used to set the flag/feature.
>
> Accept both short and long legacy flag names in "ethool -K".
>
> Reported-by: Konstantin Kharlamov <hi-angel@yandex.ru>
> Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Thanks (belatedly) -- queued for next release!
John
--
John W. Linville Someday the world will need a hero, and you
linville@tuxdriver.com might be all we have. Be ready.
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