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Message-ID: <CACGkMEu_pKJukgKuPbTksfemRrfFCb9qbu0iVDKx0O8HL-8q1w@mail.gmail.com> Date: Mon, 17 Oct 2022 15:13:12 +0800 From: Jason Wang <jasowang@...hat.com> To: Zhu Lingshan <lingshan.zhu@...el.com> Cc: mst@...hat.com, stephen@...workplumber.org, dsahern@...nel.org, virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, hang.yuan@...el.com Subject: Re: [PATCH] iproute2/vdpa: Add support for reading device features On Fri, Oct 14, 2022 at 5:50 PM Zhu Lingshan <lingshan.zhu@...el.com> wrote: > > This commit implements support for reading vdpa device > features in iproute2. > > Example: > $ vdpa dev config show vdpa0 > vdpa0: mac 00:e8:ca:11:be:05 link up link_announce false max_vq_pairs 4 mtu 1500 > negotiated_features MRG_RXBUF CTRL_VQ MQ VERSION_1 ACCESS_PLATFORM > dev_features MTU MAC MRG_RXBUF CTRL_VQ MQ ANY_LAYOUT VERSION_1 ACCESS_PLATFORM > > Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com> Note that Si Wei proposed to unify the two new attributes: > --- > vdpa/vdpa.c | 15 +++++++++++++-- > 1 file changed, 13 insertions(+), 2 deletions(-) > > diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c > index b73e40b4..89844e92 100644 > --- a/vdpa/vdpa.c > +++ b/vdpa/vdpa.c > @@ -87,6 +87,8 @@ static const enum mnl_attr_data_type vdpa_policy[VDPA_ATTR_MAX + 1] = { > [VDPA_ATTR_DEV_NEGOTIATED_FEATURES] = MNL_TYPE_U64, > [VDPA_ATTR_DEV_MGMTDEV_MAX_VQS] = MNL_TYPE_U32, > [VDPA_ATTR_DEV_SUPPORTED_FEATURES] = MNL_TYPE_U64, > + [VDPA_ATTR_DEV_FEATURES] = MNL_TYPE_U64, > + [VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES] = MNL_TYPE_U64, > }; > > static int attr_cb(const struct nlattr *attr, void *data) > @@ -482,7 +484,7 @@ static const char * const *dev_to_feature_str[] = { > > #define NUM_FEATURE_BITS 64 > > -static void print_features(struct vdpa *vdpa, uint64_t features, bool mgmtdevf, > +static void print_features(struct vdpa *vdpa, uint64_t features, bool devf, > uint16_t dev_id) > { > const char * const *feature_strs = NULL; > @@ -492,7 +494,7 @@ static void print_features(struct vdpa *vdpa, uint64_t features, bool mgmtdevf, > if (dev_id < ARRAY_SIZE(dev_to_feature_str)) > feature_strs = dev_to_feature_str[dev_id]; > > - if (mgmtdevf) > + if (devf) > pr_out_array_start(vdpa, "dev_features"); > else > pr_out_array_start(vdpa, "negotiated_features"); > @@ -771,6 +773,15 @@ static void pr_out_dev_net_config(struct vdpa *vdpa, struct nlattr **tb) > val_u64 = mnl_attr_get_u64(tb[VDPA_ATTR_DEV_NEGOTIATED_FEATURES]); > print_features(vdpa, val_u64, false, dev_id); > } > + if (tb[VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES]) { > + uint16_t dev_id = 0; > + > + if (tb[VDPA_ATTR_DEV_ID]) > + dev_id = mnl_attr_get_u32(tb[VDPA_ATTR_DEV_ID]); > + > + val_u64 = mnl_attr_get_u64(tb[VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES]); > + print_features(vdpa, val_u64, true, dev_id); > + } > } > > static void pr_out_dev_config(struct vdpa *vdpa, struct nlattr **tb) > -- > 2.31.1 >
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