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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Shuah Khan Cc: Simon Horman , Donald Hunter , Boris Pismenny , Mark Bloch , Andrew Lunn , Willem de Bruijn , Rahul Rameshbabu , Cosmin Ratiu , Raed Salem , Kuniyuki Iwashima , netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH net-next 5/5] netdevsim: implement psp device stats Date: Wed, 22 Oct 2025 12:37:37 -0700 Message-ID: <20251022193739.1376320-6-daniel.zahka@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251022193739.1376320-1-daniel.zahka@gmail.com> References: <20251022193739.1376320-1-daniel.zahka@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit For now only tx/rx packets/bytes are reported. This is not compliant with the PSP Architecture Specification. Signed-off-by: Daniel Zahka --- drivers/net/netdevsim/netdevsim.h | 5 +++++ drivers/net/netdevsim/psp.c | 27 +++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 02c1c97b7008..af6fcfcda8ba 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -109,6 +109,11 @@ struct netdevsim { int rq_reset_mode; struct { + u64 rx_packets; + u64 rx_bytes; + u64 tx_packets; + u64 tx_bytes; + struct u64_stats_sync syncp; struct psp_dev *dev; u32 spi; u32 assoc_cnt; diff --git a/drivers/net/netdevsim/psp.c b/drivers/net/netdevsim/psp.c index 332b5b744f01..3912f2611862 100644 --- a/drivers/net/netdevsim/psp.c +++ b/drivers/net/netdevsim/psp.c @@ -70,6 +70,13 @@ nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns, *psp_ext = skb->extensions; refcount_inc(&(*psp_ext)->refcnt); skb->decrypted = 1; + + u64_stats_update_begin(&ns->psp.syncp); + ns->psp.tx_packets++; + ns->psp.rx_packets++; + ns->psp.tx_bytes += skb->len - skb_inner_transport_offset(skb); + ns->psp.rx_bytes += skb->len - skb_inner_transport_offset(skb); + u64_stats_update_end(&ns->psp.syncp); } else { struct ipv6hdr *ip6h __maybe_unused; struct iphdr *iph; @@ -164,12 +171,32 @@ static void nsim_assoc_del(struct psp_dev *psd, struct psp_assoc *pas) ns->psp.assoc_cnt--; } +static void nsim_get_stats(struct psp_dev *psd, struct psp_dev_stats *stats) +{ + struct netdevsim *ns = psd->drv_priv; + unsigned int start; + + /* WARNING: do *not* blindly zero stats in real drivers! + * All required stats must be reported by the device! + */ + memset(stats, 0, offsetof(struct psp_dev_stats, required_end)); + + do { + start = u64_stats_fetch_begin(&ns->psp.syncp); + stats->rx_bytes = ns->psp.rx_bytes; + stats->rx_packets = ns->psp.rx_packets; + stats->tx_bytes = ns->psp.tx_bytes; + stats->tx_packets = ns->psp.tx_packets; + } while (u64_stats_fetch_retry(&ns->psp.syncp, start)); +} + static struct psp_dev_ops nsim_psp_ops = { .set_config = nsim_psp_set_config, .rx_spi_alloc = nsim_rx_spi_alloc, .tx_key_add = nsim_assoc_add, .tx_key_del = nsim_assoc_del, .key_rotate = nsim_key_rotate, + .get_stats = nsim_get_stats, }; static struct psp_dev_caps nsim_psp_caps = { -- 2.47.3