Messages in this thread | | | Date | Wed, 1 Feb 2023 22:28:45 +0100 | From | Michal Kubecek <> | Subject | Re: [PATCH v4 ethtool-next 2/2] add support for IEEE 802.3cg-2019 Clause 148 - PLCA RS |
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On Sat, Dec 17, 2022 at 01:50:39AM +0100, Piergiorgio Beruto wrote: > This patch adds support for the Physical Layer Collision Avoidance > Reconciliation Sublayer which was introduced in the IEEE 802.3 > standard by the 802.3cg working group in 2019. > > The ethtool interface has been extended as follows: > - show if the device supports PLCA when ethtool is invoked without FLAGS > - additionally show what PLCA version is supported > - show the current PLCA status > - add FLAGS for getting and setting the PLCA configuration > > Signed-off-by: Piergiorgio Beruto <piergiorgio.beruto@gmail.com> > --- > Makefile.am | 1 + > ethtool.c | 21 ++++ > netlink/extapi.h | 6 + > netlink/plca.c | 295 +++++++++++++++++++++++++++++++++++++++++++++ > netlink/settings.c | 86 ++++++++++++-
Please update also the manual page (ethtool.8.in), this should be done whenever adding a new feature so that documented and implemented features don't diverge.
[...] > diff --git a/netlink/extapi.h b/netlink/extapi.h > index 1bb580a889a8..0add156e644a 100644 > --- a/netlink/extapi.h > +++ b/netlink/extapi.h [...] > @@ -114,6 +117,9 @@ nl_get_eeprom_page(struct cmd_context *ctx __maybe_unused, > #define nl_getmodule NULL > #define nl_gmodule NULL > #define nl_smodule NULL > +#define nl_get_plca_cfg NULL > +#define nl_set_plca_cfg NULL > +#define nl_get_plca_status NULL > > #endif /* ETHTOOL_ENABLE_NETLINK */ >
The function names are misspelled here so that a build with --disable-netlink fails.
[...] > diff --git a/netlink/plca.c b/netlink/plca.c > new file mode 100644 > index 000000000000..f7d7bdbc5c84 > --- /dev/null > +++ b/netlink/plca.c > @@ -0,0 +1,295 @@ > +/* > + * plca.c - netlink implementation of plca command > + * > + * Implementation of "ethtool --show-plca <dev>" and > + * "ethtool --set-plca <dev> ..." > + */ > + > +#include <errno.h> > +#include <string.h> > +#include <stdio.h> > + > +#include "../internal.h" > +#include "../common.h" > +#include "netlink.h" > +#include "bitset.h" > +#include "parser.h" > + > +/* PLCA_GET_CFG */ [...] > +int plca_get_cfg_reply_cb(const struct nlmsghdr *nlhdr, void *data) > +{ > + const struct nlattr *tb[ETHTOOL_A_PLCA_MAX + 1] = {}; > + DECLARE_ATTR_TB_INFO(tb); > + struct nl_context *nlctx = data; > + bool silent; > + int idv, val; > + int err_ret; > + int ret; [...] > + // The node count is ignored by follower nodes. However, it can > + // be pre-set to enable fast coordinator role switchover. > + // Therefore, on a follower node we still wanto to show it, > + // indicating it is not currently used. > + if (tb[ETHTOOL_A_PLCA_NODE_ID] && idv != 0) > + printf(" (ignored)");
The compiler warns that idv may be uninitialized here. While it's in wrong, AFAICS, not even gcc13 is smart enough to recognize that it's not actually possible so let's initialize the variable to make it happy. Also, both idv and val are used to store unsigned values so they should be unsigned int.
Other than these, the patch looks good to me. The next branch already has the UAPI updates needed for it so patch 1 won't be needed any more if you rebase on top of current next.
Michal [unhandled content-type:application/pgp-signature] | |